diff --git a/assets/icons/ui/refresh.svg b/assets/icons/ui/refresh.svg
new file mode 100644
index 000000000..a7da370a7
--- /dev/null
+++ b/assets/icons/ui/refresh.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#B4B6B9" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"><path d="M20 12 A8 8 0 1 1 17.66 6.34"/><path d="M20 3 V8 H15"/></svg>
diff --git a/assets/icons/ui/swap.svg b/assets/icons/ui/swap.svg
new file mode 100644
index 000000000..28b9a6395
--- /dev/null
+++ b/assets/icons/ui/swap.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#B4B6B9" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 8 H19 M15 4 L19 8 L15 12"/><path d="M20 16 H5 M9 12 L5 16 L9 20"/></svg>
diff --git a/locales/ar-SA/opencadstudio.ftl b/locales/ar-SA/opencadstudio.ftl
index 1c01174f9..55c05c95f 100644
--- a/locales/ar-SA/opencadstudio.ftl
+++ b/locales/ar-SA/opencadstudio.ftl
@@ -3274,6 +3274,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = الاستخدام: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = الاستخدام: VIEW RESTORE <name>
     .usage-view-save-name = الاستخدام: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = الاستخدام: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = الاستخدام: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = الاستخدام: __ocs_fmt_0__ NEW <name>
@@ -4361,6 +4362,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <layer> = تجميد | T <layer> = إلغاء التجميد | Enter = خروج
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = يتطلب عددًا صحيحًا بين __ocs_fmt_0__ و __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  حدد نقطة الإدراج:
     .table-block-definition-not-found = TABLE: لم يتم العثور على تعريف الكتلة.
     .table-edit-applied = TABLE: تم تطبيق التعديل.
@@ -4482,7 +4644,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  نسبة المقياس الجديدة (مثلًا 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: استخدم نسبة مثل 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  نسبة المقياس المراد إزالتها:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: لم يُنفّذ مدير مجموعات الأوراق بعد.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: المصدر ليس منفذ عرض.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: تمت مزامنة __ocs_fmt_0__ منفذ عرض مع المصدر.
     .scale-arg-already-exists = المقياس __ocs_fmt_0__ موجود بالفعل.
diff --git a/locales/bg-BG/opencadstudio.ftl b/locales/bg-BG/opencadstudio.ftl
index fe2b0bf6c..90580e443 100644
--- a/locales/bg-BG/opencadstudio.ftl
+++ b/locales/bg-BG/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Употреба: VIEW LIST | VIEW SAVE <име> | VIEW RESTORE <име> | VIEW DELETE <име>
     .usage-view-restore-name = Употреба: VIEW RESTORE <име>
     .usage-view-save-name = Употреба: VIEW SAVE <име>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Употреба: __ocs_fmt_0__ FONT <стил> <файл_шрифт>
     .usage-prefix-list-new-name-font-style-file-wid = Употреба: __ocs_fmt_0__ LIST | NEW <име> | FONT <стил> <файл> | WIDTH <стил> <фактор> | OBLIQUE <стил> <ъгъл>
     .usage-prefix-new-name = Употреба: __ocs_fmt_0__ NEW <име>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <слой> = Замрази  |  T <слой> = Размрази  |  Enter = Изход
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Изисква се цяло число между __ocs_fmt_0__ и __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Посочете точка на вмъкване:
     .table-block-definition-not-found = TABLE: дефиницията на блока не е намерена.
     .table-edit-applied = TABLE: редакцията е приложена.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  ново съотношение на мащаб (напр. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: използвай съотношение като 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  съотношение на мащаб за премахване:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Мениджърът на комплекти листове все още не е реализиран.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: главният не е изглед.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: синхронизирани __ocs_fmt_0__ изглед(а) с главния.
     .scale-arg-already-exists = Мащаб __ocs_fmt_0__ вече съществува.
diff --git a/locales/cs-CZ/opencadstudio.ftl b/locales/cs-CZ/opencadstudio.ftl
index 10cc0a116..164a35b37 100644
--- a/locales/cs-CZ/opencadstudio.ftl
+++ b/locales/cs-CZ/opencadstudio.ftl
@@ -3259,6 +3259,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Používání: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Použití: VIEW RESTORE <name>
     .usage-view-save-name = Použití: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Použití: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Používání: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Použití: __ocs_fmt_0__ NEW <name>
@@ -4346,6 +4347,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Zmrazit | T <layer> = Rozmrazit | Enter = Konec
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Vyžaduje celé číslo mezi __ocs_fmt_0__ a __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Určete bod vložení:
     .table-block-definition-not-found = TABLE: definice bloku nebyla nalezena.
     .table-edit-applied = TABLE: úprava byla použita.
@@ -4467,7 +4629,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD nový poměr měřítka (např. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: použijte poměr jako 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE měřítko pro odstranění:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Správce sady listů dosud není implementován.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: hlavní není výřez.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: synchronizované výřezy __ocs_fmt_0__ s hlavním serverem.
     .scale-arg-already-exists = Měřítko __ocs_fmt_0__ již existuje.
diff --git a/locales/de-DE/opencadstudio.ftl b/locales/de-DE/opencadstudio.ftl
index 605ccb174..af1a89ea7 100644
--- a/locales/de-DE/opencadstudio.ftl
+++ b/locales/de-DE/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Verwendung: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Verwendung: VIEW RESTORE <name>
     .usage-view-save-name = Verwendung: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Verwendung: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Verwendung: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Verwendung: __ocs_fmt_0__ NEW <name>
@@ -4347,6 +4348,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <Ebene> = Einfrieren | T <Ebene> = Auftauen | Eingabe = Beenden
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Erfordert eine ganze Zahl zwischen __ocs_fmt_0__ und __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Einfügepunkt angeben:
     .table-block-definition-not-found = TABLE: Blockdefinition nicht gefunden.
     .table-edit-applied = TABLE: Bearbeitung angewendet.
@@ -4468,7 +4630,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  neues Skalenverhältnis (z. B. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: Verwenden Sie ein Verhältnis wie 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  Skalenverhältnis zum Entfernen:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Plansatzverwaltung noch nicht implementiert.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: Master ist kein Ansichtsfenster.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: synchronisiert __ocs_fmt_0__ Ansichtsfenster(s) mit dem Master.
     .scale-arg-already-exists = Die Skala __ocs_fmt_0__ existiert bereits.
diff --git a/locales/el-GR/opencadstudio.ftl b/locales/el-GR/opencadstudio.ftl
index 433624525..196d3d06b 100644
--- a/locales/el-GR/opencadstudio.ftl
+++ b/locales/el-GR/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Χρήση: VIEW LIST | VIEW SAVE <όνομα> | VIEW RESTORE <όνομα> | VIEW DELETE <όνομα>
     .usage-view-restore-name = Χρήση: VIEW RESTORE <όνομα>
     .usage-view-save-name = Χρήση: VIEW SAVE <όνομα>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Χρήση: __ocs_fmt_0__ FONT <στυλ> <αρχείο_γραμματοσειράς>
     .usage-prefix-list-new-name-font-style-file-wid = Χρήση: __ocs_fmt_0__ LIST | NEW <όνομα> | FONT <στυλ> <αρχείο> | WIDTH <στυλ> <συντελεστής> | OBLIQUE <στυλ> <γωνία>
     .usage-prefix-new-name = Χρήση: __ocs_fmt_0__ NEW <όνομα>
@@ -4349,6 +4350,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <επίπεδο> = Πάγωμα  |  T <επίπεδο> = Ξεπάγωμα  |  Enter = Έξοδος
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Απαιτείται ακέραιος αριθμός μεταξύ __ocs_fmt_0__ και __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .message = __ocs_fmt_0__
     .code-page = Κωδικοσελίδα:         __ocs_fmt_0__
     .created-julian-6 = Δημιουργία (Julian):  __ocs_fmt_0__
@@ -4464,7 +4626,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  νέος λόγος κλίμακας (π.χ. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: χρησιμοποιήστε λόγο της μορφής 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  λόγος κλίμακας προς αφαίρεση:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: η Διαχείριση συνόλων φύλλων δεν έχει υλοποιηθεί ακόμη.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: η κύρια δεν είναι θύρα προβολής.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: συγχρονίστηκαν __ocs_fmt_0__ θύρα(ες) προβολής με την κύρια.
     .scale-arg-already-exists = Η κλίμακα __ocs_fmt_0__ υπάρχει ήδη.
diff --git a/locales/en-US/opencadstudio.ftl b/locales/en-US/opencadstudio.ftl
index 6f3f4730d..107c621ec 100644
--- a/locales/en-US/opencadstudio.ftl
+++ b/locales/en-US/opencadstudio.ftl
@@ -3263,6 +3263,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Usage: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Usage: VIEW RESTORE <name>
     .usage-view-save-name = Usage: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Usage: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Usage: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Usage: __ocs_fmt_0__ NEW <name>
@@ -4350,6 +4351,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <layer> = Freeze  |  T <layer> = Thaw  |  Enter = Exit
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Requires an integer between __ocs_fmt_0__ and __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .message =     __ocs_fmt_0__
     .code-page =   Code page:         __ocs_fmt_0__
     .created-julian-6 =   Created (Julian):  __ocs_fmt_0__
@@ -4465,7 +4627,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  new scale ratio (e.g. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: use a ratio like 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  scale ratio to remove:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Sheet Set Manager not yet implemented.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: master is not a viewport.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: synced __ocs_fmt_0__ viewport(s) to the master.
     .scale-arg-already-exists = Scale __ocs_fmt_0__ already exists.
diff --git a/locales/es-ES/opencadstudio.ftl b/locales/es-ES/opencadstudio.ftl
index 4bb6669be..67dd6ba9a 100644
--- a/locales/es-ES/opencadstudio.ftl
+++ b/locales/es-ES/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Uso: VIEW LIST | VIEW SAVE <nombre> | VIEW RESTORE <nombre> | VIEW DELETE <nombre>
     .usage-view-restore-name = Uso: VIEW RESTORE <nombre>
     .usage-view-save-name = Uso: VIEW SAVE <nombre>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Uso: __ocs_fmt_0__ FONT <estilo> <archivo_fuente>
     .usage-prefix-list-new-name-font-style-file-wid = Uso: __ocs_fmt_0__ LIST | NEW <nombre> | FONT <estilo> <archivo> | WIDTH <estilo> <factor> | OBLIQUE <estilo> <ángulo>
     .usage-prefix-new-name = Uso: __ocs_fmt_0__ NEW <nombre>
@@ -4349,6 +4350,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <capa> = Inutilizar | T <capa> = Reutilizar | Intro = Salir
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Requiere un número entero entre __ocs_fmt_0__ y __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Especifique el punto de inserción:
     .table-block-definition-not-found = TABLE: no se encontró la definición de bloque.
     .table-edit-applied = TABLE: edición aplicada.
@@ -4470,7 +4632,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  nueva relación de escala (p. ej., 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: use una relación como 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  relación de escala que eliminar:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: el Administrador de conjuntos de planos aún no está implementado.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: el principal no es una ventana gráfica.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: se sincronizaron __ocs_fmt_0__ ventanas gráficas con la principal.
     .scale-arg-already-exists = La escala __ocs_fmt_0__ ya existe.
diff --git a/locales/fi-FI/opencadstudio.ftl b/locales/fi-FI/opencadstudio.ftl
index e01e8ffca..8e0135715 100644
--- a/locales/fi-FI/opencadstudio.ftl
+++ b/locales/fi-FI/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Käyttö: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Käyttö: VIEW RESTORE <name>
     .usage-view-save-name = Käyttö: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Käyttö: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Käyttö: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Käyttö: __ocs_fmt_0__ NEW <name>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Jäädytys | T <layer> = Sulatus | Enter = Poistu
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Vaatii kokonaisluvun väliltä __ocs_fmt_0__–__ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Määritä lisäyspiste:
     .table-block-definition-not-found = TABLE: lohkomääritystä ei löytynyt.
     .table-edit-applied = TABLE: muokkaus otettu käyttöön.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD uusi mittasuhde (esim. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: käytä suhdetta kuten 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE irrotettava asteikkosuhde:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Sheet Set Manager ei ole vielä otettu käyttöön.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: isäntä ei ole näkymä.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: synkronoitu __ocs_fmt_0__-näkymä(t) isäntälaitteeseen.
     .scale-arg-already-exists = Asteikko __ocs_fmt_0__ on jo olemassa.
diff --git a/locales/fr-FR/opencadstudio.ftl b/locales/fr-FR/opencadstudio.ftl
index ca2bda963..6fafb6da2 100644
--- a/locales/fr-FR/opencadstudio.ftl
+++ b/locales/fr-FR/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Utilisation : VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Utilisation : VIEW RESTORE <name>
     .usage-view-save-name = Utilisation : VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Utilisation : __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Utilisation : __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Utilisation : __ocs_fmt_0__ NEW <name>
@@ -4349,6 +4350,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Freeze , T <layer> = Thaw , Entrée = Sortie
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Nécessite un nombre entier compris entre __ocs_fmt_0__ et __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Spécifiez le point d’insertion :
     .table-block-definition-not-found = TABLE : définition de bloc introuvable.
     .table-edit-applied = TABLE : modification appliquée.
@@ -4470,7 +4632,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  nouveau rapport d'échelle (par exemple 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD : utiliser un rapport comme 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  rapport d'échelle à supprimer:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Gestionnaire de la série de feuilles non encore implémenté.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS : l’objet maître n’est pas une fenêtre.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS : __ocs_fmt_0__ fenêtre(s) synchronisée(s) avec la fenêtre maître.
     .scale-arg-already-exists = L'échelle __ocs_fmt_0__ existe déjà.
diff --git a/locales/hi-IN/opencadstudio.ftl b/locales/hi-IN/opencadstudio.ftl
index 3585bacf9..285a0d263 100644
--- a/locales/hi-IN/opencadstudio.ftl
+++ b/locales/hi-IN/opencadstudio.ftl
@@ -3250,6 +3250,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = उपयोग: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = उपयोग: VIEW RESTORE <name>
     .usage-view-save-name = उपयोग: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = उपयोग: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = उपयोग: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = उपयोग: __ocs_fmt_0__ NEW <name>
@@ -4337,6 +4338,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <लेयर> = फ़्रीज़ | T <लेयर> = थॉ | Enter = बाहर निकलें
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = __ocs_fmt_0__ और __ocs_fmt_1__ के बीच एक पूर्णांक आवश्यक है।
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  सम्मिलन बिंदु निर्दिष्ट करें:
     .table-block-definition-not-found = TABLE: ब्लॉक परिभाषा नहीं मिली।
     .table-edit-applied = TABLE: संपादन लागू किया गया।
@@ -4458,7 +4620,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  नया स्केल अनुपात (जैसे 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: 1:50 की तरह अनुपात का उपयोग करें।
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  हटाने के लिए पैमाने अनुपात:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: शीट सेट मैनेजर अभी तक लागू नहीं हुआ।
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: मास्टर ऑब्जेक्ट व्यूपोर्ट नहीं है।
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: __ocs_fmt_0__ व्यूपोर्ट मास्टर से सिंक किए गए।
     .scale-arg-already-exists = स्केल __ocs_fmt_0__ पहले से मौजूद है।
diff --git a/locales/hu-HU/opencadstudio.ftl b/locales/hu-HU/opencadstudio.ftl
index 665907146..45d605bdb 100644
--- a/locales/hu-HU/opencadstudio.ftl
+++ b/locales/hu-HU/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Használat: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Használat: VIEW RESTORE <name>
     .usage-view-save-name = Használat: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Használat: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Használat: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Használat: __ocs_fmt_0__ NEW <name>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Fagyasztás | T <layer> = Felengedés | Enter = Kilépés
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = __ocs_fmt_0__ és __ocs_fmt_1__ közötti egész szám szükséges.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Adja meg a beszúrási pontot:
     .table-block-definition-not-found = TABLE: a blokkdefiníció nem található.
     .table-edit-applied = TABLE: a módosítás alkalmazva.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD új méretarány (pl. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: használjon 1:50-hez hasonló arányt.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE méretarány az eltávolításhoz:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: A Lapkészlet-kezelő még nincs implementálva.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: a mester nem nézetablak.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: a __ocs_fmt_0__ nézetablak(ok) szinkronizálva a mesterrel.
     .scale-arg-already-exists = A __ocs_fmt_0__ skála már létezik.
diff --git a/locales/it-IT/opencadstudio.ftl b/locales/it-IT/opencadstudio.ftl
index 134de2c2b..1fb906f72 100644
--- a/locales/it-IT/opencadstudio.ftl
+++ b/locales/it-IT/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Utilizzo: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Utilizzo: VIEW RESTORE <name>
     .usage-view-save-name = Utilizzo: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Utilizzo: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Utilizzo: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Utilizzo: __ocs_fmt_0__ NEW <name>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Congela | T <layer> = Scongela | Enter = Esci
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Richiede un numero intero compreso tra __ocs_fmt_0__ e __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Specificare il punto di inserimento:
     .table-block-definition-not-found = TABLE: definizione del blocco non trovata.
     .table-edit-applied = TABLE: modifica applicata.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD nuovo rapporto di scala (es. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: utilizzare un rapporto come 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE rapporto di scala da rimuovere:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Gestione set di fogli non ancora implementata.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: master non è un viewport.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: finestre __ocs_fmt_0__ sincronizzate con il master.
     .scale-arg-already-exists = La scala __ocs_fmt_0__ esiste già.
diff --git a/locales/ja-JP/opencadstudio.ftl b/locales/ja-JP/opencadstudio.ftl
index 77c7b54d9..7b67bfb34 100644
--- a/locales/ja-JP/opencadstudio.ftl
+++ b/locales/ja-JP/opencadstudio.ftl
@@ -3252,6 +3252,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = 使用法: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = 使用法: VIEW RESTORE <name>
     .usage-view-save-name = 使用法: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = 使用法: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = 使用法: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = 使用法: __ocs_fmt_0__ NEW <name>
@@ -4337,6 +4338,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <layer> = フリーズ  |  T <layer> = フリーズ解除  |  Enter = 終了
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = __ocs_fmt_0__ から __ocs_fmt_1__ までの整数が必要です。
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  挿入点を指定:
     .table-block-definition-not-found = TABLE: ブロック定義が見つかりません。
     .table-edit-applied = TABLE: 編集を適用しました。
@@ -4458,7 +4620,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  新しい尺度比（例: 1:50）:
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: 1:50 のような比率を使用してください。
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  削除する尺度比:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: シートセット管理は未実装です。
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: マスターはビューポートではありません。
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: __ocs_fmt_0__ 個のビューポートをマスターに同期しました。
     .scale-arg-already-exists = 尺度 __ocs_fmt_0__ は既に存在します。
diff --git a/locales/ko-KR/opencadstudio.ftl b/locales/ko-KR/opencadstudio.ftl
index 1d4e4ef29..6144064e8 100644
--- a/locales/ko-KR/opencadstudio.ftl
+++ b/locales/ko-KR/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = 사용법: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = 사용법: VIEW RESTORE <name>
     .usage-view-save-name = 사용법: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = 사용법: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = 사용법: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = 사용법: __ocs_fmt_0__ NEW <name>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = 동결 | T <layer> = 해동 | Enter = 종료
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = __ocs_fmt_0__에서 __ocs_fmt_1__ 사이의 정수가 필요합니다.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  삽입점 지정:
     .table-block-definition-not-found = TABLE: 블록 정의를 찾을 수 없습니다.
     .table-edit-applied = TABLE: 편집을 적용했습니다.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD 새로운 축척 비율(예: 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: 1:50과 같은 비율을 사용합니다.
     .scalelistedit-delete-scale-ratio-to-remove = 제거할 SCALELISTEDIT DELETE 축척 비율:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: 시트 세트 관리자가 아직 구현되지 않았습니다.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: 마스터가 뷰포트가 아닙니다.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: __ocs_fmt_0__ 뷰포트를 마스터에 동기화했습니다.
     .scale-arg-already-exists = 스케일 __ocs_fmt_0__가 이미 존재합니다.
diff --git a/locales/nl-NL/opencadstudio.ftl b/locales/nl-NL/opencadstudio.ftl
index 8a7b29a64..10467728b 100644
--- a/locales/nl-NL/opencadstudio.ftl
+++ b/locales/nl-NL/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Gebruik: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Gebruik: VIEW RESTORE <name>
     .usage-view-save-name = Gebruik: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Gebruik: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Gebruik: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Gebruik: __ocs_fmt_0__ NEW <name>
@@ -4347,6 +4348,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <laag> = Bevriezen | T <laag> = Ontdooien | Enter = Afsluiten
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Vereist een geheel getal tussen __ocs_fmt_0__ en __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Geef invoegpunt op:
     .table-block-definition-not-found = TABLE: blokdefinitie niet gevonden.
     .table-edit-applied = TABLE: bewerking toegepast.
@@ -4468,7 +4630,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  nieuwe schaalverhouding (bv. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: gebruik een verhouding als 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  schaalverhouding te verwijderen:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: beheer van bladsets is nog niet geïmplementeerd.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: master is geen weergavevenster.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: gesynchroniseerd __ocs_fmt_0__ weergavevenster(s) naar de master.
     .scale-arg-already-exists = Schaal __ocs_fmt_0__ bestaat al.
diff --git a/locales/pl-PL/opencadstudio.ftl b/locales/pl-PL/opencadstudio.ftl
index b425dee41..110a8b3d9 100644
--- a/locales/pl-PL/opencadstudio.ftl
+++ b/locales/pl-PL/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Zastosowanie: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Zastosowanie: VIEW RESTORE <name>
     .usage-view-save-name = Zastosowanie: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Zastosowanie: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Zastosowanie: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Zastosowanie: __ocs_fmt_0__ NEW <name>
@@ -4348,6 +4349,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <layer> = Zamrożenie | T <layer> = Odwilż | Enter = Wyjście
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Wymagana liczba całkowita z zakresu od __ocs_fmt_0__ do __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Wskaż punkt wstawienia:
     .table-block-definition-not-found = TABLE: nie znaleziono definicji bloku.
     .table-edit-applied = TABLE: zastosowano edycję.
@@ -4469,7 +4631,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD nowa skala (np. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: użyj proporcji np. 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE współczynnik skali do usunięcia:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Menedżer zestawów arkuszy nie został jeszcze zaimplementowany.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: master nie jest rzutnią.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: zsynchronizowane rzutnie __ocs_fmt_0__ z wzorcem.
     .scale-arg-already-exists = Skala __ocs_fmt_0__ już istnieje.
diff --git a/locales/pt-BR/opencadstudio.ftl b/locales/pt-BR/opencadstudio.ftl
index 4f1c800b8..63199f7f9 100644
--- a/locales/pt-BR/opencadstudio.ftl
+++ b/locales/pt-BR/opencadstudio.ftl
@@ -3262,6 +3262,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Uso: VIEW LIST | VIEW SAVE <nome> | VIEW RESTORE <nome> | VIEW DELETE <nome>
     .usage-view-restore-name = Uso: VIEW RESTORE <nome>
     .usage-view-save-name = Uso: VIEW SAVE <nome>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Uso: __ocs_fmt_0__ FONT <estilo> <arquivo_fonte>
     .usage-prefix-list-new-name-font-style-file-wid = Uso: __ocs_fmt_0__ LIST | NEW <nome> | FONT <estilo> <arquivo> | WIDTH <estilo> <fator> | OBLIQUE <estilo> <ângulo>
     .usage-prefix-new-name = Uso: __ocs_fmt_0__ NEW <nome>
@@ -4349,6 +4350,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <camada> = Congelar | T <camada> = Descongelar | Enter = Sair
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Requer um número inteiro entre __ocs_fmt_0__ e __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Especifique o ponto de inserção:
     .table-block-definition-not-found = TABLE: definição de bloco não encontrada.
     .table-edit-applied = TABLE: edição aplicada.
@@ -4470,7 +4632,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  nova proporção de escala (por exemplo, 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: use uma proporção como 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  proporção de escala a remover:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: o Gerenciador de conjuntos de folhas ainda não foi implementado.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: o principal não é uma janela de visualização.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: __ocs_fmt_0__ janelas de visualização sincronizadas com a principal.
     .scale-arg-already-exists = A escala __ocs_fmt_0__ já existe.
diff --git a/locales/ru-RU/opencadstudio.ftl b/locales/ru-RU/opencadstudio.ftl
index 3c8c71a8e..26905e368 100644
--- a/locales/ru-RU/opencadstudio.ftl
+++ b/locales/ru-RU/opencadstudio.ftl
@@ -3263,6 +3263,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Использование: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Использование: VIEW RESTORE <name>
     .usage-view-save-name = Использование: VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Использование: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Использование: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Использование: __ocs_fmt_0__ NEW <name>
@@ -4350,6 +4351,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER F <слой> = заморозить | T <слой> = разморозить | Enter = выход
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = Требуется целое число от __ocs_fmt_0__ до __ocs_fmt_1__.
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  Укажите точку вставки:
     .table-block-definition-not-found = TABLE: определение блока не найдено.
     .table-edit-applied = TABLE: изменение применено.
@@ -4471,7 +4633,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD Новое соотношение масштаба (например, 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: использовать соотношение 1:50.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE Удаляемое соотношение масштаба:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Диспетчер наборов листов еще не реализован.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: главный объект не является видовым экраном.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: с главным экраном синхронизировано видовых экранов: __ocs_fmt_0__.
     .scale-arg-already-exists = Масштаб __ocs_fmt_0__ уже существует.
diff --git a/locales/tr-TR/opencadstudio.ftl b/locales/tr-TR/opencadstudio.ftl
index 43908e04f..ab9a47f55 100644
--- a/locales/tr-TR/opencadstudio.ftl
+++ b/locales/tr-TR/opencadstudio.ftl
@@ -1918,7 +1918,7 @@ common =
     .allow-selection-cycling = Allow selection cycling
     .allow-writing-to-source-file = Allow writing to source file
     .break-specify-second-break-point-or-first-point = BREAK  Specify second break point or [First point]:
-    .begin = Begin
+    .begin = Başla
     .chamferedge-select-a-base-face-edge = CHAMFEREDGE: select a base face edge.
     .cannot-delete-beyond-this = Cannot delete beyond this.
     .cell-range = Cell range
@@ -2169,7 +2169,7 @@ common =
     .select-surfaces-to-thicken = Select surfaces to thicken:
     .selected-objects-in-current-drawing = Selected objects in current drawing
     .set-cell-styles = Set cell styles
-    .sheet = Sheet
+    .sheet = Sayfa
     .show-associativity = Show associativity
     .show-command-prompting-and-command-input-near-crosshairs = Show command prompting and command input near crosshairs
     .show-count-column = Show count column
@@ -3242,6 +3242,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = Kullanım: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = Kullanım: VIEW RESTORE <name>
     .usage-view-save-name = Kullanım: VIEW SAVE <name>
+    .usage-view-window = Kullanım: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = Kullanım: __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = Kullanım: __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = Kullanım: __ocs_fmt_0__ NEW <name>
@@ -4309,6 +4310,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <layer> = Dondur | T <layer> = Çöz | Enter = Çık
 
 view =
+    .ss-create-sheet-set = Sayfa Kümesi Oluştur
+    .ss-requires-integer-between = __ocs_fmt_0__ ile __ocs_fmt_1__ arasında bir tam sayı gerekir.
+    .ss-new-sheet = Yeni Sayfa
+    .ss-subset-properties = Alt Küme Özellikleri
+    .ss-rename-renumber-sheet = Sayfayı Yeniden Adlandır ve Numaralandır
+    .ss-import-layout-as-sheet = Düzeni Sayfa Olarak İçe Aktar
+    .ss-sheet-set-manager = Sayfa Kümesi Yöneticisi
+    .ss-open = Aç...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Bir sayfa kümesi açın veya NEWSHEETSET ile yeni bir küme oluşturun.
+    .ss-no-sheet-views = Sayfa görünümü yok.
+    .ss-no-locations = Konum yok.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Çift tık sayfayı açar. Diğer komutlar için sağ tıklayın.
+    .ss-an-empty-sheet-set = Boş sayfa kümesi
+    .ss-existing-drawings = Var olan çizimler
+    .ss-create-a-folder-hierarchy-based-on-subsets = Alt kümelere göre klasör hiyerarşisi oluştur
+    .ss-sheet-set-properties = Sayfa Kümesi Özellikleri...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Çizim içeren klasörleri seçin. Çizimlerdeki düzenler sayfa kümesine eklenebilir.
+    .ss-sheet-set = Sayfa Kümesi
+    .ss-sheet-set-data-file = Sayfa kümesi veri dosyası
+    .ss-sheets-to-import = İçe aktarılacak sayfalar
+    .ss-add-custom-property = Özel Özellik Ekle...
+    .ss-new-sheet-x = Yeni Sayfa...
+    .ss-new-subset = Yeni Alt Küme...
+    .ss-import-layout-as-sheet-x = Düzeni Sayfa Olarak İçe Aktar...
+    .ss-rename-renumber = Yeniden Adlandır ve Numaralandır...
+    .ss-close-sheet-set = Sayfa Kümesini Kapat
+    .ss-properties = Özellikler...
+    .ss-sheet-list = Sayfa Listesi
+    .ss-sheet-views = Sayfa Görünümleri
+    .ss-model-views = Model Görünümleri
+    .ss-views-by-sheet = Sayfaya göre görünümler
+    .ss-locations = Konumlar
+    .ss-create-a-sheet-set-using = Sayfa kümesini şununla oluştur
+    .ss-name-of-new-sheet-set = Yeni sayfa kümesinin adı:
+    .ss-description-optional = Açıklama (isteğe bağlı):
+    .ss-store-sheet-set-data-file-dst-here = Sayfa kümesi veri dosyasını (.dst) buraya kaydet:
+    .ss-choose-layouts = Düzenleri Seç
+    .ss-confirm = Onayla
+    .ss-default-value = Varsayılan değer:
+    .ss-owner = Sahip
+    .ss-custom-properties = Özel Özellikler
+    .ss-sheet-title = Sayfa başlığı
+    .ss-folder-path = Klasör yolu
+    .ss-sheet-template = Sayfa şablonu
+    .ss-subset-name = Alt küme adı
+    .ss-new-sheet-location = Yeni sayfa konumu
+    .ss-remove-subset = Alt Kümeyi Kaldır
+    .ss-rename-subset = Alt Kümeyi Yeniden Adlandır...
+    .ss-content-model-space = İçerik model uzayına yerleştirilemez. Kağıt uzayına geçip yeniden deneyin.
+    .ss-cannot-read = okunamıyor
+    .ss-rename-renumber-view = Görünümü Yeniden Adlandır ve Numaralandır
+    .ss-list-of-blocks = Blok Listesi
+    .ss-select-block = Blok Seç
+    .ss-set-category = Kategori ata
+    .ss-place-callout-block = Açıklama Bloğu Yerleştir
+    .ss-place-view-label-block = Görünüm Etiketi Bloğu Yerleştir
+    .ss-place-on-sheet = Sayfaya Yerleştir
+    .ss-see-model-space-views = Model Uzayı Görünümlerini Göster
+    .ss-view-title = Görünüm başlığı
+    .ss-add-x = Ekle…
+    .ss-blocks-associated = Bu sayfa kümesiyle ilişkili bloklar
+    .ss-enter-drawing-file-name = Çizim dosyası adı
+    .ss-enter-drawing-file-name-msg = Çizim dosyası adını girin.
+    .ss-select-drawing-as-block = Çizim dosyasını blok olarak seç
+    .ss-choose-blocks-in-drawing = Çizim dosyasındaki blokları seç
+    .ss-preview = önizleme
+    .ss-open-sheet-to-place = Görünüm yerleştirmek için bu kümenin bir sayfasını kendi düzeninde açın.
+    .ss-open-view-sheet = Blok yerleştirmek için görünümün sayfasını kendi düzeninde açın.
+    .ss-no-label-block = Sayfa kümesinin görünüm etiketi bloğu yok.
+    .ss-no-view-to-place = __ocs_fmt_0__: yerleştirilecek görünüm yok.
+    .ss-cannot-be-read = __ocs_fmt_0__: okunamıyor.
+    .ss-layout-already-part = Bu düzen zaten bir sayfa kümesinde - içe aktarılamaz.
+    .ss-layout-may-belong = Uyarı: bu düzen başka bir sayfa kümesine ait olabilir.
+    .ss-status-missing = yok
+    .ss-status-open = açık
+    .ss-view-by-category = Kategoriye göre
+    .ss-view-by-sheet = Sayfaya göre
+    .ss-import-layouts-as-sheets = Düzenleri Sayfa Olarak İçe Aktar
+    .ss-remove-sheets = Sayfaları Kaldır
+    .ss-view-category = Görünüm Kategorisi
+    .ss-new-view-category = Yeni Görünüm Kategorisi…
+    .ss-add-new-location = Yeni Konum Ekle…
+    .ss-remove-location = Konumu Kaldır
+    .ss-publish-by-sheet = Sayfanın 'Yayımlamaya dahil et' ayarına göre
+    .ss-do-not-publish-sheets = Sayfaları yayımlama
+    .ss-open-in-drawing-editor = Çizim düzenleyicide aç
+    .ss-create-folder-hierarchy = Klasör hiyerarşisi oluştur
+    .ss-publish-sheets-in-subset = Alt kümedeki sayfaları yayımla
+    .ss-rename-options = Yeniden adlandırma seçenekleri
+    .ss-rename-layout-to-match = Düzeni eşleşecek şekilde adlandır:
+    .ss-prefix-with-sheet-number = Önüne sayfa numarası
+    .ss-rename-drawing-file-to-match = Çizim dosyasını eşleşecek şekilde adlandır:
+    .ss-available-for-import = Hazır
+    .ss-drawings = Çizimler
+    .ss-select-drawing-files-containing-layouts = Düzen içeren çizim dosyalarını seçin
+    .ss-browse-for-drawings = Çizimlere Gözat…
+    .ss-a-layout-can-belong-to-only-one-sheet-set = Bir düzen yalnız bir sayfa kümesine ait olabilir. Başka bir kümeye ait düzeni içe aktarmak için düzenin kopyasını oluşturun.
+    .ss-prefix-sheet-titles-with-file-name = Sayfa başlıklarına dosya adını önek olarak ekle
+    .ss-import-checked = İşaretlileri İçe Aktar
+    .ss-template = Şablon
+    .ss-drawing-template-file-name = Çizim şablonu dosya adı
+    .ss-select-a-layout-to-create-new-sheets = Yeni sayfalar için bir düzen seçin
+    .ss-category-name = Kategori adı
+    .ss-select-the-callout-blocks = Bu kategoride kullanılacak açıklama blokları
+    .ss-selected-blocks-will-be-available = Seçilen bloklar görünüm sekmesinden açıklama bloğu eklerken sunulur.
+    .ss-add-blocks = Blok Ekle…
+    .ss-layout-and-drawing-not-deleted = (Düzen ve çizim dosyası silinmez.)
+    .ss-remove-sheet-question = "__ocs_fmt_0__" sayfası "__ocs_fmt_1__" sayfa kümesinden kaldırılsın mı?
+    .ss-drawing-open-cannot-rename = Çizim açık; dosyasını yeniden adlandırmak için kapatın.
+    .ss-category-name-empty = Kategori adı boş olamaz.
+    .ss-associate-hyperlink = Köprü ilişkilendir
+    .ss-remove-sheet = Sayfayı Kaldır
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Çizim içeren bir veya daha fazla klasör belirtmenizi sağlar. Bu çizimlerdeki düzenler sayfa kümesine otomatik olarak aktarılabilir.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Alt kümesi ve sayfası olmayan bir sayfa kümesi oluşturur.
+    .ss-open-sheet-set = Sayfa Kümesini Aç
+    .ss-sheet-set-dst = Sayfa Kümesi (*.dst)
+    .ss-browse-for-folder = Klasöre Gözat
+    .ss-select-layout-as-sheet-template = Sayfa Şablonu Olarak Düzen Seç
+    .ss-drawing-template-dwt = Çizim Şablonu (*.dwt)
+    .ss-drawing-dwg = Çizim (*.dwg)
+    .ss-the-name-cannot-be-empty = Ad boş olamaz.
+    .ss-a-custom-property-with-this-name-already-exists = Bu adda bir özel özellik zaten var.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sayfa kümeleri birden çok çizimdeki düzenleri adlandırılmış tek bir sayfa grubunda toplar.
+    .ss-default-new-drawing = (varsayılan yeni çizim)
+    .ss-select-drawing = Çizim Seç
+    .ss-the-sheet-set-name-cannot-be-empty = Sayfa kümesi adı boş olamaz.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = Sayfa kümesi veri dosyasının klasörü yok.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = Çizimde sayfa şablonu olarak kullanılabilecek düzen yok.
+    .ss-the-subset-name-cannot-be-empty = Alt küme adı boş olamaz.
+    .ss-the-drawing-has-no-layout-to-import = Çizimde içe aktarılacak düzen yok.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = Bu düzen zaten bu sayfa kümesinin bir sayfası.
+    .ss-the-sheet-title-cannot-be-empty = Sayfa başlığı boş olamaz.
+    .ss-the-sheet-folder-cannot-be-created = Sayfa klasörü oluşturulamıyor.
+    .ss-sheet-set-properties-x = Sayfa Kümesi Özellikleri
+    .ss-sheet-properties = Sayfa Özellikleri
+    .ss-sheet-drawing-not-found = Sayfa çizimi bulunamadı: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ zaten var.
+    .ss-model-view = Model görünümü
+    .ss-label-block-for-views = Görünümler için etiket bloğu
+    .ss-callout-blocks = Belirtme blokları
+    .ss-page-setup-overrides-file = Sayfa düzeni geçersiz kılma dosyası
+    .ss-project-control = Proje Denetimi
+    .ss-sheet-creation = Sayfa Oluşturma
+    .ss-sheet-storage-location = Sayfa kayıt konumu
+    .ss-sheet-creation-template = Sayfa oluşturma şablonu
+    .ss-prompt-for-template = Şablon için sor
+    .ss-subset = Alt Küme
+    .ss-layout-name = Düzen adı
+    .ss-drawing-file = Çizim dosyası
+    .ss-project-number = Proje numarası
+    .ss-project-name = Proje adı
+    .ss-project-phase = Proje evresi
+    .ss-project-milestone = Proje aşaması
+    .ss-revision-number = Revizyon numarası
+    .ss-revision-date = Revizyon tarihi
+    .ss-issue-purpose = Yayın amacı
+    .ss-custom-property-name = Özel özellik adı
+    .ss-placeholder-type = Yer tutucu türü
+    .ss-sheet-set-x = Sayfa kümesi
+    .ss-sheet-navigation-tree = Sayfa gezinme ağacı
+    .ss-sheetset = Sayfa Kümesi
     .message = __ocs_fmt_0__
     .code-page = Kod sayfası: __ocs_fmt_0__
     .created-julian-6 = Oluşturulma (Jülyen): __ocs_fmt_0__
@@ -4420,7 +4582,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  Yeni ölçek oranı (ör. 1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDIT ADD: 1:50 gibi bir oran kullanın.
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  Kaldırılacak ölçek oranı:
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET: Pafta Seti Yöneticisi henüz uygulanmadı.
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS: Ana nesne bir görünüm alanı değil.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS: __ocs_fmt_0__ görünüm alanı ana görünüm alanıyla eşitlendi.
     .scale-arg-already-exists = __ocs_fmt_0__ ölçeği zaten var.
diff --git a/locales/zh-CN/opencadstudio.ftl b/locales/zh-CN/opencadstudio.ftl
index 0249f7cfa..359156e41 100644
--- a/locales/zh-CN/opencadstudio.ftl
+++ b/locales/zh-CN/opencadstudio.ftl
@@ -3249,6 +3249,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = 用法： VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = 用法： VIEW RESTORE <name>
     .usage-view-save-name = 用法： VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = 用法： __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = 用法： __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = 用法： __ocs_fmt_0__ NEW <name>
@@ -4332,6 +4333,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <图层> = 冻结  |  T <图层> = 解冻  |  Enter = 退出
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = 需要介于 __ocs_fmt_0__ 和 __ocs_fmt_1__ 之间的整数。
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  指定插入点：
     .table-block-definition-not-found = TABLE：未找到块定义。
     .table-edit-applied = TABLE：已应用编辑。
@@ -4453,7 +4615,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  新比额表比率(如1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDITADD:使用比例如1:50。
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  要删除的缩放比例 :
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET:工作表集管理器尚未执行 。
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS:主人不是观光港.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS：已将 __ocs_fmt_0__ 个视口与主视口同步。
     .scale-arg-already-exists = 缩放 __ocs_fmt_0__ 已经存在 。
diff --git a/locales/zh-TW/opencadstudio.ftl b/locales/zh-TW/opencadstudio.ftl
index 354f9442d..8bf96cb85 100644
--- a/locales/zh-TW/opencadstudio.ftl
+++ b/locales/zh-TW/opencadstudio.ftl
@@ -3261,6 +3261,7 @@ layers =
     .usage-view-list-view-save-name-view-restore-na = 用法： VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>
     .usage-view-restore-name = 用法： VIEW RESTORE <name>
     .usage-view-save-name = 用法： VIEW SAVE <name>
+    .usage-view-window = Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>
     .usage-prefix-font-style-font-file = 用法： __ocs_fmt_0__ FONT <style> <font_file>
     .usage-prefix-list-new-name-font-style-file-wid = 用法： __ocs_fmt_0__ LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>
     .usage-prefix-new-name = 用法： __ocs_fmt_0__ NEW <name>
@@ -4344,6 +4345,167 @@ layout =
     .vplayer-f-layer-freeze-t-layer-thaw-enter-exit = VPLAYER  F <圖層> = 凍結  |  T <圖層> = 解凍  |  Enter = 退出
 
 view =
+    .ss-create-sheet-set = Create Sheet Set
+    .ss-requires-integer-between = 需要介於 __ocs_fmt_0__ 和 __ocs_fmt_1__ 之間的整數。
+    .ss-new-sheet = New Sheet
+    .ss-subset-properties = Subset Properties
+    .ss-rename-renumber-sheet = Rename & Renumber Sheet
+    .ss-import-layout-as-sheet = Import Layout as Sheet
+    .ss-sheet-set-manager = Sheet Set Manager
+    .ss-open = Open...
+    .ss-open-a-sheet-set-or-create-one-with-newsheetset = Open a sheet set or create one with NEWSHEETSET.
+    .ss-no-sheet-views = No sheet views.
+    .ss-no-locations = No locations.
+    .ss-double-click-opens-a-sheet-right-click-for-more-commands = Double-click opens a sheet. Right-click for more commands.
+    .ss-an-empty-sheet-set = An empty sheet set
+    .ss-existing-drawings = Existing drawings
+    .ss-create-a-folder-hierarchy-based-on-subsets = Create a folder hierarchy based on subsets
+    .ss-sheet-set-properties = Sheet Set Properties...
+    .ss-select-folders-containing-drawings-layouts-in-the-drawings-c = Select folders containing drawings. Layouts in the drawings can be added to the sheet set.
+    .ss-sheet-set = Sheet Set
+    .ss-sheet-set-data-file = Sheet set data file
+    .ss-sheets-to-import = Sheets to import
+    .ss-add-custom-property = Add Custom Property...
+    .ss-new-sheet-x = New Sheet...
+    .ss-new-subset = New Subset...
+    .ss-import-layout-as-sheet-x = Import Layout as Sheet...
+    .ss-rename-renumber = Rename & Renumber...
+    .ss-close-sheet-set = Close Sheet Set
+    .ss-properties = Properties...
+    .ss-sheet-list = Sheet List
+    .ss-sheet-views = Sheet Views
+    .ss-model-views = Model Views
+    .ss-views-by-sheet = Views by sheet
+    .ss-locations = Locations
+    .ss-create-a-sheet-set-using = Create a sheet set using
+    .ss-name-of-new-sheet-set = Name of new sheet set:
+    .ss-description-optional = Description (optional):
+    .ss-store-sheet-set-data-file-dst-here = Store sheet set data file (.dst) here:
+    .ss-choose-layouts = Choose Layouts
+    .ss-confirm = Confirm
+    .ss-default-value = Default value:
+    .ss-owner = Owner
+    .ss-custom-properties = Custom Properties
+    .ss-sheet-title = Sheet title
+    .ss-folder-path = Folder path
+    .ss-sheet-template = Sheet template
+    .ss-subset-name = Subset name
+    .ss-new-sheet-location = New sheet location
+    .ss-remove-subset = Remove Subset
+    .ss-rename-subset = Rename Subset...
+    .ss-content-model-space = Content cannot be placed into model space. Please switch to paper space and try again.
+    .ss-cannot-read = cannot be read
+    .ss-rename-renumber-view = Rename & Renumber View
+    .ss-list-of-blocks = List of Blocks
+    .ss-select-block = Select Block
+    .ss-set-category = Set category
+    .ss-place-callout-block = Place Callout Block
+    .ss-place-view-label-block = Place View Label Block
+    .ss-place-on-sheet = Place on Sheet
+    .ss-see-model-space-views = See Model Space Views
+    .ss-view-title = View title
+    .ss-add-x = Add...
+    .ss-blocks-associated = The following blocks are associated with this sheet set:
+    .ss-enter-drawing-file-name = Enter the drawing file name:
+    .ss-enter-drawing-file-name-msg = Enter the drawing file name.
+    .ss-select-drawing-as-block = Select the drawing file as a block
+    .ss-choose-blocks-in-drawing = Choose blocks in the drawing file:
+    .ss-preview = preview
+    .ss-open-sheet-to-place = Open a sheet of this sheet set at its layout to place a view on it.
+    .ss-open-view-sheet = Open the view's sheet at its layout to place a block on it.
+    .ss-no-label-block = The sheet set has no label block for views.
+    .ss-no-view-to-place = __ocs_fmt_0__: no view to place.
+    .ss-cannot-be-read = __ocs_fmt_0__: cannot be read.
+    .ss-layout-already-part = This layout is already part of a sheet set - not available for import.
+    .ss-layout-may-belong = Warning: this layout may belong to another sheet set.
+    .ss-status-missing = missing
+    .ss-status-open = open
+    .ss-view-by-category = View by category
+    .ss-view-by-sheet = View by sheet
+    .ss-import-layouts-as-sheets = Import Layouts as Sheets
+    .ss-remove-sheets = Remove Sheets
+    .ss-view-category = View Category
+    .ss-new-view-category = New View Category...
+    .ss-add-new-location = Add New Location...
+    .ss-remove-location = Remove Location
+    .ss-publish-by-sheet = Publish by Sheet 'Include for Publish' Setting
+    .ss-do-not-publish-sheets = Do Not Publish Sheets
+    .ss-open-in-drawing-editor = Open in drawing editor
+    .ss-create-folder-hierarchy = Create folder hierarchy
+    .ss-publish-sheets-in-subset = Publish sheets in subset
+    .ss-rename-options = Rename options
+    .ss-rename-layout-to-match = Rename layout to match:
+    .ss-prefix-with-sheet-number = Prefix with sheet number
+    .ss-rename-drawing-file-to-match = Rename drawing file to match:
+    .ss-available-for-import = Available for import
+    .ss-drawings = Drawings
+    .ss-select-drawing-files-containing-layouts = Select drawing files containing layouts
+    .ss-browse-for-drawings = Browse for Drawings...
+    .ss-a-layout-can-belong-to-only-one-sheet-set = A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.
+    .ss-prefix-sheet-titles-with-file-name = Prefix sheet titles with file name
+    .ss-import-checked = Import Checked
+    .ss-template = Template
+    .ss-drawing-template-file-name = Drawing template file name
+    .ss-select-a-layout-to-create-new-sheets = Select a layout to create new sheets
+    .ss-category-name = Category name
+    .ss-select-the-callout-blocks = Select the callout blocks to be used in this category
+    .ss-selected-blocks-will-be-available = Selected blocks will be available for selection when you insert a callout block from the view tab.
+    .ss-add-blocks = Add Blocks...
+    .ss-layout-and-drawing-not-deleted = (The layout and the drawing file will not be deleted.)
+    .ss-remove-sheet-question = Are you sure that you want to remove __ocs_fmt_0__ Sheet from __ocs_fmt_1__ Sheet Set?
+    .ss-drawing-open-cannot-rename = The drawing is open; close it to rename its file.
+    .ss-category-name-empty = The category name cannot be empty.
+    .ss-associate-hyperlink = Associate hyperlink
+    .ss-remove-sheet = Remove Sheet
+    .ss-lets-you-specify-one-or-more-folders-containing-drawings-the = Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set.
+    .ss-creates-a-sheet-set-with-no-subsets-or-sheets = Creates a sheet set with no subsets or sheets.
+    .ss-open-sheet-set = Open Sheet Set
+    .ss-sheet-set-dst = Sheet Set (*.dst)
+    .ss-browse-for-folder = Browse for Folder
+    .ss-select-layout-as-sheet-template = Select Layout as Sheet Template
+    .ss-drawing-template-dwt = Drawing Template (*.dwt)
+    .ss-drawing-dwg = Drawing (*.dwg)
+    .ss-the-name-cannot-be-empty = The name cannot be empty.
+    .ss-a-custom-property-with-this-name-already-exists = A custom property with this name already exists.
+    .ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n = Sheet sets organize layouts from several drawings into one named set of sheets.
+    .ss-default-new-drawing = (default new drawing)
+    .ss-select-drawing = Select Drawing
+    .ss-the-sheet-set-name-cannot-be-empty = The sheet set name cannot be empty.
+    .ss-the-folder-for-the-sheet-set-data-file-does-not-exist = The folder for the sheet set data file does not exist.
+    .ss-the-drawing-has-no-layout-to-use-as-a-sheet-template = The drawing has no layout to use as a sheet template.
+    .ss-the-subset-name-cannot-be-empty = The subset name cannot be empty.
+    .ss-the-drawing-has-no-layout-to-import = The drawing has no layout to import.
+    .ss-the-layout-is-already-a-sheet-of-this-sheet-set = The layout is already a sheet of this sheet set.
+    .ss-the-sheet-title-cannot-be-empty = The sheet title cannot be empty.
+    .ss-the-sheet-folder-cannot-be-created = The sheet folder cannot be created.
+    .ss-sheet-set-properties-x = Sheet Set Properties
+    .ss-sheet-properties = Sheet Properties
+    .ss-sheet-drawing-not-found = Sheet drawing not found: __ocs_fmt_0__
+    .ss-already-exists = __ocs_fmt_0__ already exists.
+    .ss-model-view = Model view
+    .ss-label-block-for-views = Label block for views
+    .ss-callout-blocks = Callout blocks
+    .ss-page-setup-overrides-file = Page setup overrides file
+    .ss-project-control = Project Control
+    .ss-sheet-creation = Sheet Creation
+    .ss-sheet-storage-location = Sheet storage location
+    .ss-sheet-creation-template = Sheet creation template
+    .ss-prompt-for-template = Prompt for template
+    .ss-subset = Subset
+    .ss-layout-name = Layout name
+    .ss-drawing-file = Drawing file
+    .ss-project-number = Project number
+    .ss-project-name = Project name
+    .ss-project-phase = Project phase
+    .ss-project-milestone = Project milestone
+    .ss-revision-number = Revision number
+    .ss-revision-date = Revision date
+    .ss-issue-purpose = Issue purpose
+    .ss-custom-property-name = Custom property name
+    .ss-placeholder-type = Placeholder type
+    .ss-sheet-set-x = Sheet set
+    .ss-sheet-navigation-tree = Sheet navigation tree
+    .ss-sheetset = SheetSet
     .datalink-specify-insertion-point = DATALINK  指定插入點：
     .table-block-definition-not-found = TABLE：找不到圖塊定義。
     .table-edit-applied = TABLE：已套用編輯。
@@ -4465,7 +4627,6 @@ view =
     .scalelistedit-add-new-scale-ratio-e-g-1-50 = SCALELISTEDIT ADD  新比額表比率(如1:50):
     .scalelistedit-add-use-a-ratio-like-1-50 = SCALELISTEDITADD:使用比例如1:50。
     .scalelistedit-delete-scale-ratio-to-remove = SCALELISTEDIT DELETE  要刪除的縮放比例 :
-    .sheetset-sheet-set-manager-not-yet-implemented = SHEETSET:工作表集管理器尚未實作 。
     .syncpviewports-master-is-not-a-viewport = SYNCPVIEWPORTS:主人不是觀光港.
     .syncpviewports-synced-n-viewport-s-to-the-mast = SYNCPVIEWPORTS：已將 __ocs_fmt_0__ 個視口與主視口同步。
     .scale-arg-already-exists = 縮放 __ocs_fmt_0__ 已經存在 。
diff --git a/src/app/command_driver/utilities.rs b/src/app/command_driver/utilities.rs
index f80076737..3cd862ae0 100644
--- a/src/app/command_driver/utilities.rs
+++ b/src/app/command_driver/utilities.rs
@@ -784,6 +784,8 @@ impl OpenCADStudio {
         if tokens[0].eq_ignore_ascii_case("BACKGROUND")
             || tokens[0].eq_ignore_ascii_case("COLORSCHEME")
             || tokens[0].eq_ignore_ascii_case("XREF")
+            // `VIEW WINDOW <name> <x1,y1> <x2,y2>` takes its arguments in one line.
+            || tokens[0].eq_ignore_ascii_case("VIEW")
         {
             return self.dispatch_command(cmd);
         }
diff --git a/src/app/commands/display.rs b/src/app/commands/display.rs
index 16925118b..f1e8efe20 100644
--- a/src/app/commands/display.rs
+++ b/src/app/commands/display.rs
@@ -595,12 +595,6 @@ impl OpenCADStudio {
                     .push_info(crate::t!("TOOLPALETTES: Tool Palettes not yet implemented.").as_ref());
             }
 
-            // ── SHEETSET — not yet implemented ───────────────────────────────────
-            "SHEETSET" => {
-                self.command_line
-                    .push_info(crate::t!("SHEETSET: Sheet Set Manager not yet implemented.").as_ref());
-            }
-
             // ── XDATA — read/write extended entity data ──────────────────────────
             // XDATA LIST             — show all xdata records on selected entities
             // XDATA SET <app> <str>  — append a string xdata value for <app>
diff --git a/src/app/commands/field.rs b/src/app/commands/field.rs
index 3f0ee8a93..81a56df1b 100644
--- a/src/app/commands/field.rs
+++ b/src/app/commands/field.rs
@@ -5,7 +5,7 @@ use crate::app::{Message, OpenCADStudio};
 use crate::command::CadCommand;
 use crate::modules::annotate::field_cmd::{FieldObjectPickCommand, FieldPlaceCommand, FieldTablePickCommand};
 use crate::ui::window::field_dialog::{
-    fields_of, object_properties, FieldDialogMsg, FieldDialogState, FieldTarget, DATE_FORMATS,
+    fields_of, nav_props, object_properties, FieldDialogMsg, FieldDialogState, FieldTarget, DATE_FORMATS,
     NAMED_TYPES,
 };
 use iced::Task;
@@ -103,6 +103,15 @@ impl OpenCADStudio {
             .iter()
             .map(|f| self.field_value(&format!("\\AcVar Date \\f \"{f}\""), &[]))
             .collect();
+        if let Some(db) = self.sheet_set.db() {
+            let custom = codec::sheet_set::custom_properties(db.sheet_set());
+            let names = |flag: i32| custom.iter().filter(|(_, _, f)| f & flag != 0).map(|(n, _, _)| n.clone()).collect();
+            state.ss_sheet_custom = names(codec::sheet_set::CUSTOM_SHEET_PROP);
+            state.ss_set_custom = names(codec::sheet_set::CUSTOM_SHEET_SET_PROP);
+            state.ss_set_name = db.name().to_string();
+        }
+        state.ss_sets = self.sheet_set.sets.clone();
+        state.ss_set = self.sheet_set.current.unwrap_or(0);
         self.field_dialog = Some(state);
         self.fill_named_objects();
         self.refresh_field_preview();
@@ -180,8 +189,73 @@ impl OpenCADStudio {
             }
             FieldDialogMsg::Name(n) => {
                 state.name = n;
-                state.text_case = 0;
+                // Sheet set fields start in Title case.
+                state.text_case = if crate::ui::window::field_dialog::SHEET_SET_FIELDS.contains(&n) { 4 } else { 0 };
+                state.ss_custom.clear();
+                state.ss_node.clear();
+                state.ss_prop.clear();
+                // SheetSet starts on the set and its first property; SheetView on nothing.
+                if n == "SheetSet" {
+                    if let Some(db) = state.ss_sets.get(state.ss_set) {
+                        state.ss_node = db.sheet_set().id().to_string();
+                        state.ss_prop = nav_props(db, &state.ss_node).first().map(|p| p.0.clone()).unwrap_or_default();
+                    }
+                }
             }
+            FieldDialogMsg::SsCustom(name) => state.ss_custom = name,
+            FieldDialogMsg::SsSet(k) => {
+                state.ss_set = k;
+                state.ss_node.clear();
+                state.ss_prop.clear();
+            }
+            FieldDialogMsg::SsNode(id) => {
+                state.ss_prop = state
+                    .ss_sets
+                    .get(state.ss_set)
+                    .and_then(|db| nav_props(db, &id).first().map(|p| p.0.clone()))
+                    .unwrap_or_default();
+                state.ss_node = id;
+            }
+            FieldDialogMsg::SsProp(p) => state.ss_prop = p,
+            FieldDialogMsg::SsHref(v) => state.ss_href = v,
+            FieldDialogMsg::SsBrowse => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Open Sheet Set").as_ref())
+                            .add_filter(crate::t!("Sheet Set (*.dst)").as_ref(), &["dst", "DST"])
+                            .pick_file()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::FieldDialog(FieldDialogMsg::SsPicked(p)),
+                );
+            }
+            FieldDialogMsg::SsPicked(None) => {}
+            FieldDialogMsg::SsPicked(Some(path)) => match crate::app::commands::sheet_set::read_set(&path.to_string_lossy()) {
+                Ok(db) => {
+                    let key = codec::sheet_set::path_key(&path.to_string_lossy());
+                    let open = state
+                        .ss_sets
+                        .iter()
+                        .position(|d| d.path.as_deref().is_some_and(|p| codec::sheet_set::path_key(p) == key));
+                    state.ss_set = match open {
+                        Some(k) => k,
+                        None => {
+                            state.ss_sets.push(db);
+                            state.ss_sets.len() - 1
+                        }
+                    };
+                    state.ss_node.clear();
+                    state.ss_prop.clear();
+                }
+                Err(e) => self.command_line.push_error(&format!("{}: {e}", path.display())),
+            },
+            FieldDialogMsg::SsPlaceholder(k) => {
+                state.ss_placeholder = k;
+                state.ss_custom.clear();
+            }
+            FieldDialogMsg::SsScaleFormat(k) => state.ss_scale_format = k,
             FieldDialogMsg::DateFormat(f) => state.date_format = f,
             FieldDialogMsg::DateExample(k) => {
                 if let Some(f) = DATE_FORMATS.get(k) {
diff --git a/src/app/commands/layerprops.rs b/src/app/commands/layerprops.rs
index e39b64a24..c899c281e 100644
--- a/src/app/commands/layerprops.rs
+++ b/src/app/commands/layerprops.rs
@@ -803,6 +803,29 @@ impl OpenCADStudio {
                                 .push_output(crate::tf!("View '{}' saved.", name).as_ref());
                         }
                     }
+                    "WINDOW" | "W" => {
+                        // A plan view of the window between two corners.
+                        let args: Vec<&str> = parts.get(2).map(|s| s.split_whitespace().collect()).unwrap_or_default();
+                        let corner = |s: &str| {
+                            let mut c = s.split(',');
+                            Some((c.next()?.trim().parse::<f64>().ok()?, c.next()?.trim().parse::<f64>().ok()?))
+                        };
+                        match (args.first(), args.get(1).and_then(|s| corner(s)), args.get(2).and_then(|s| corner(s))) {
+                            (Some(name), Some(a), Some(b)) if a.0 != b.0 && a.1 != b.1 => {
+                                use codec::types::Vector3;
+                                let mut view = self.tabs[i].scene.current_as_named_view(name);
+                                view.target = Vector3 { x: (a.0 + b.0) / 2.0, y: (a.1 + b.1) / 2.0, z: 0.0 };
+                                view.direction = Vector3 { x: 0.0, y: 0.0, z: 1.0 };
+                                view.width = (b.0 - a.0).abs();
+                                view.height = (b.1 - a.1).abs();
+                                self.tabs[i].scene.document.views.add_or_replace(view);
+                                self.command_line.push_output(crate::tf!("View '{}' saved.", name).as_ref());
+                            }
+                            _ => self
+                                .command_line
+                                .push_error(crate::t!("Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>").as_ref()),
+                        }
+                    }
                     "DELETE" | "DEL" | "D" => {
                         let name = parts.get(2).map(|s| s.trim()).unwrap_or("").to_string();
                         if name.is_empty() {
diff --git a/src/app/commands/mod.rs b/src/app/commands/mod.rs
index 5bca869e3..67f5be6a3 100644
--- a/src/app/commands/mod.rs
+++ b/src/app/commands/mod.rs
@@ -22,6 +22,7 @@ mod pc_colormap;
 mod pc_extract;
 mod pdf_underlay;
 mod pdf_dialogs;
+pub(crate) mod sheet_set;
 mod xclip;
 mod blockvars;
 mod plotvars;
@@ -322,6 +323,9 @@ impl OpenCADStudio {
         if let Some(t) = self.dispatch_attdef(cmd, i) {
             return Some(t);
         }
+        if let Some(t) = self.dispatch_sheet_set(cmd, i) {
+            return Some(t);
+        }
         if let Some(t) = self.dispatch_field(cmd, i) {
             return Some(t);
         }
@@ -886,6 +890,15 @@ inventory::submit!(crate::command::CommandRegistration {
         "CREATESKETCH",
         "FINISHSKETCH",
         "SHEETSET",
+        "SHEETSETHIDE",
+        "NEWSHEETSET",
+        "OPENSHEETSET",
+        "SSMAUTOOPEN",
+        "SSLOCATE",
+        "SSMPOLLTIME",
+        "SSMSHEETSTATUS",
+        "SSMSTATE",
+        "SSFOUND",
         "SHORTCUTS",
         "SSM",
         "STEPOUT",
diff --git a/src/app/commands/sheet_set.rs b/src/app/commands/sheet_set.rs
new file mode 100644
index 000000000..4a228a75f
--- /dev/null
+++ b/src/app/commands/sheet_set.rs
@@ -0,0 +1,2745 @@
+//! Sheet sets: SHEETSET / SHEETSETHIDE / NEWSHEETSET / OPENSHEETSET, the
+//! SSM* / SS* system variables, the Sheet Set Manager palette and its
+//! dialogs, the drawing's sheet link written on save and located on open.
+
+use crate::app::{Message, OpenCADStudio};
+use crate::ui::window::sheet_set::{
+    BlockList, Category, FieldId, Form, FormKind, FoundLayout, ImportRead, ImportRow, MenuAction, Placing, PropRow,
+    Properties, RowKey, SelectBlock, SheetSetMsg, SheetStatus, SsDialog, TemplatePick, ViewAction, Wizard, WizardMsg,
+};
+use crate::command::{CadCommand, CmdOption, CmdResult};
+use codec::entities::Entity as _;
+use crate::scene::model::wire_model::WireModel;
+use glam::DVec3;
+use codec::sheet_set::{self as ss, ComponentKind, LayoutReference, SheetSetData, SheetSetDatabase};
+use iced::Task;
+use std::path::{Path, PathBuf};
+
+/// The variables this family answers for.
+pub(super) const SHEET_SET_SYSVARS: &[&str] =
+    &["SSMAUTOOPEN", "SSLOCATE", "SSMPOLLTIME", "SSMSHEETSTATUS", "SSMSTATE", "SSFOUND"];
+
+/// Paper-space layouts of a drawing in tab order: name and handle (hex).
+fn paper_layouts(doc: &codec::CadDocument) -> Vec<(String, String)> {
+    let mut layouts: Vec<(i16, String, String)> = doc
+        .objects
+        .values()
+        .filter_map(|o| match o {
+            codec::objects::ObjectType::Layout(l) if !l.name.eq_ignore_ascii_case("Model") => {
+                Some((l.tab_order, l.name.clone(), format!("{:X}", l.handle.value())))
+            }
+            _ => None,
+        })
+        .collect();
+    layouts.sort();
+    layouts.into_iter().map(|(_, n, h)| (n, h)).collect()
+}
+
+/// UTC now as the reference stamps `UpdateTime`: `yyyy/MM/dd HH:mm:ss.fff`.
+fn utc_stamp() -> String {
+    let ms = iced::time::SystemTime::now()
+        .duration_since(iced::time::SystemTime::UNIX_EPOCH)
+        .map(|d| d.as_millis() as i64)
+        .unwrap_or(0);
+    let (days, rem) = (ms.div_euclid(86_400_000), ms.rem_euclid(86_400_000));
+    // Civil date from days since 1970-01-01.
+    let z = days + 719_468;
+    let era = z.div_euclid(146_097);
+    let doe = z - era * 146_097;
+    let yoe = (doe - doe / 1460 + doe / 36_524 - doe / 146_096) / 365;
+    let doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
+    let mp = (5 * doy + 2) / 153;
+    let d = doy - (153 * mp + 2) / 5 + 1;
+    let m = if mp < 10 { mp + 3 } else { mp - 9 };
+    let y = yoe + era * 400 + i64::from(m <= 2);
+    format!(
+        "{y:04}/{m:02}/{d:02} {:02}:{:02}:{:02}.{:03}",
+        rem / 3_600_000,
+        rem / 60_000 % 60,
+        rem / 1000 % 60,
+        rem % 1000
+    )
+}
+
+fn folder_of(path: &str) -> String {
+    Path::new(path).parent().map(|p| p.to_string_lossy().to_string()).unwrap_or_default()
+}
+
+/// `.dst` access: native only (a browser has no file paths to read or write).
+#[cfg(not(target_arch = "wasm32"))]
+pub(crate) fn read_set(path: &str) -> Result<SheetSetDatabase, String> {
+    SheetSetDatabase::read(path)
+}
+
+#[cfg(target_arch = "wasm32")]
+pub(crate) fn read_set(_path: &str) -> Result<SheetSetDatabase, String> {
+    Err(crate::t!("Not available").into_owned())
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+fn write_set(db: &mut SheetSetDatabase, path: &str) -> Result<(), String> {
+    db.write(path)
+}
+
+#[cfg(target_arch = "wasm32")]
+fn write_set(_db: &mut SheetSetDatabase, _path: &str) -> Result<(), String> {
+    Err(crate::t!("Not available").into_owned())
+}
+
+/// The user and machine names a lock file carries.
+#[cfg(not(target_arch = "wasm32"))]
+fn lock_owner() -> (String, String) {
+    let user = std::env::var("USERNAME").or_else(|_| std::env::var("USER")).unwrap_or_default();
+    let machine = std::env::var("COMPUTERNAME")
+        .or_else(|_| std::env::var("HOSTNAME"))
+        .ok()
+        .or_else(|| std::fs::read_to_string("/etc/hostname").ok().map(|h| h.trim().to_string()))
+        .unwrap_or_default();
+    (user, machine)
+}
+
+/// The drawings whose lock files this application wrote, with the writing
+/// process id, kept in the config folder so a crashed session's locks can
+/// be told from someone else's and taken back.
+#[cfg(not(target_arch = "wasm32"))]
+fn lock_record() -> Option<PathBuf> {
+    Some(crate::config::config_dir()?.join("sheet_set_locks.txt"))
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+fn recorded_locks() -> Vec<(u32, PathBuf)> {
+    let text = lock_record().and_then(|p| std::fs::read_to_string(p).ok()).unwrap_or_default();
+    text.lines()
+        .filter_map(|l| {
+            let (pid, path) = l.split_once('\t')?;
+            Some((pid.parse().ok()?, PathBuf::from(path)))
+        })
+        .collect()
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+fn record_lock(path: &Path, held: bool) {
+    let Some(record) = lock_record() else { return };
+    let mut locks = recorded_locks();
+    locks.retain(|(_, p)| p != path);
+    if held {
+        locks.push((std::process::id(), path.to_path_buf()));
+    }
+    let text: String = locks.iter().map(|(pid, p)| format!("{pid}\t{}\n", p.display())).collect();
+    if let Some(dir) = record.parent() {
+        let _ = std::fs::create_dir_all(dir);
+    }
+    let _ = std::fs::write(record, text);
+}
+
+/// Whether the `.dwl` next to `path` is one an earlier session of this
+/// application left behind (it crashed): recorded by another process, and
+/// still naming this user and machine.
+// ponytail: the recorded process is assumed gone (the app is single
+// instance); check it is alive if several instances ever share a profile.
+#[cfg(not(target_arch = "wasm32"))]
+fn stale_own_lock(path: &Path) -> bool {
+    let me = std::process::id();
+    if !recorded_locks().iter().any(|(pid, p)| p == path && *pid != me) {
+        return false;
+    }
+    let text = std::fs::read_to_string(path.with_extension("dwl")).unwrap_or_default();
+    let mut lines = text.lines().map(str::trim);
+    let (user, machine) = lock_owner();
+    lines.next() == Some(user.as_str()) && lines.next() == Some(machine.as_str())
+}
+
+/// `<drawing>.dwl` (user, machine, date lines) and `<drawing>.dwl2` (the same
+/// as XML), as the reference writes them for a drawing it has open. The date
+/// is the OS long date, two spaces and the 24-hour time.
+// ponytail: .dwl is written as UTF-8; the reference's encoding of non-ASCII
+// day names was not measured.
+#[cfg(not(target_arch = "wasm32"))]
+fn write_lock(path: &Path) -> std::io::Result<()> {
+    let (user, machine) = lock_owner();
+    let stamp = crate::entities::field::long_date_time_now();
+    std::fs::write(path.with_extension("dwl"), format!("{user}\n{machine} \n{stamp}"))?;
+    std::fs::write(
+        path.with_extension("dwl2"),
+        format!(
+            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<whprops>\n<username>{user}</username>\n\
+             <machinename>{machine} </machinename>\n<fullname></fullname>\n<datetime>{stamp}</datetime>\n</whprops>"
+        ),
+    )?;
+    record_lock(path, true);
+    Ok(())
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+pub(in crate::app) fn release_lock(path: &Path) {
+    let _ = std::fs::remove_file(path.with_extension("dwl"));
+    let _ = std::fs::remove_file(path.with_extension("dwl2"));
+    record_lock(path, false);
+}
+
+/// The insertion point of Place on Sheet (with the scale, picked from the
+/// right-click list) or of a callout / view label block.
+struct SheetSetPlaceCommand {
+    /// The view's size in model units (zero for a block).
+    size: (f64, f64),
+    scale: f64,
+    scales: Vec<(String, f64)>,
+}
+
+impl CadCommand for SheetSetPlaceCommand {
+    fn name(&self) -> &'static str {
+        "SSMPLACE"
+    }
+
+    fn prompt(&self) -> String {
+        crate::t!("Specify insertion point:").into_owned()
+    }
+
+    fn options(&self) -> Vec<CmdOption> {
+        self.scales.iter().map(|(name, _)| CmdOption::new(name, name)).collect()
+    }
+
+    fn wants_text_input(&self) -> bool {
+        !self.scales.is_empty()
+    }
+
+    fn on_text_input(&mut self, text: &str) -> Option<CmdResult> {
+        let (_, scale) = self.scales.iter().find(|(name, _)| name.eq_ignore_ascii_case(text.trim()))?;
+        self.scale = *scale;
+        Some(CmdResult::NeedPoint)
+    }
+
+    fn on_point(&mut self, pt: DVec3) -> CmdResult {
+        CmdResult::Dispatch(format!("_SSMPLACEPOINT {} {} {}", pt.x, pt.y, self.scale))
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_escape(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    /// The viewport's outline follows the cursor at its lower-left corner.
+    fn on_preview_wires(&mut self, pt: DVec3) -> Vec<WireModel> {
+        let (w, h) = (self.size.0 * self.scale, self.size.1 * self.scale);
+        if w <= 0.0 || h <= 0.0 {
+            return Vec::new();
+        }
+        let p = |x: f64, y: f64| [pt.x + x, pt.y + y, pt.z];
+        vec![WireModel::solid_f64(
+            "ssm_place".to_string(),
+            vec![p(0.0, 0.0), p(w, 0.0), p(w, h), p(0.0, h), p(0.0, 0.0)],
+            WireModel::CYAN,
+            false,
+        )]
+    }
+}
+
+/// A model view to place: centre (world), width, height, target, direction.
+struct ModelView {
+    center: codec::types::Vector3,
+    width: f64,
+    height: f64,
+    target: codec::types::Vector3,
+    direction: codec::types::Vector3,
+}
+
+/// Named view `view` of a model drawing, or its extents.
+fn model_view(doc: &codec::CadDocument, view: Option<&str>) -> Option<ModelView> {
+    use codec::types::Vector3;
+    if let Some(name) = view {
+        let v = doc.views.iter().find(|v| !v.paper_space && v.name.eq_ignore_ascii_case(name))?;
+        let c = crate::scene::named_view_center(v);
+        return Some(ModelView {
+            center: Vector3::new(c.x, c.y, c.z),
+            width: v.width.abs().max(1e-6),
+            height: v.height.abs().max(1e-6),
+            target: v.target.clone(),
+            direction: v.direction.clone(),
+        });
+    }
+    let (lo, hi) = (&doc.header.model_space_extents_min, &doc.header.model_space_extents_max);
+    let (w, h) = (hi.x - lo.x, hi.y - lo.y);
+    if !(w > 0.0 && h > 0.0 && w.is_finite() && h.is_finite()) {
+        return None;
+    }
+    Some(ModelView {
+        center: Vector3::new((lo.x + hi.x) / 2.0, (lo.y + hi.y) / 2.0, 0.0),
+        width: w,
+        height: h,
+        target: Vector3::ZERO,
+        direction: Vector3::new(0.0, 0.0, 1.0),
+    })
+}
+
+/// The `Database("…").SheetSet("…").Component("…").` prefix of a navigation field.
+fn component_prefix(db: &SheetSetDatabase, id: &str) -> String {
+    format!(
+        "Database(\"{}\").SheetSet(\"{}\").Component(\"{id}\").",
+        ss::native_path(db.path.as_deref().unwrap_or("")),
+        db.sheet_set().id()
+    )
+}
+
+/// Whether new sheets of `component` prompt for their template: its own
+/// "Prompt for template", else the nearest parent's.
+fn prompts_for_template(db: &SheetSetDatabase, component: &str) -> bool {
+    let mut id = component.to_string();
+    for _ in 0..32 {
+        let Some(el) = db.find(&id) else { return false };
+        if let Some(v) = el.prop("PromptForDwt") {
+            return !matches!(v.trim(), "" | "0");
+        }
+        match db.parent_of(&id) {
+            Some(p) => id = p.id().to_string(),
+            None => return false,
+        }
+    }
+    false
+}
+
+/// A drawing's paper-space layouts and sheet link, for Import (run on a
+/// worker thread).
+fn read_import(path: &Path) -> ImportRead {
+    let doc = crate::io::load_file(path).map_err(|e| e.to_string())?;
+    Ok((paper_layouts(&doc), doc.sheet_set_data()))
+}
+
+/// Read the drawings picked for Import off the UI thread.
+fn read_imports(paths: Vec<PathBuf>, new_form: bool) -> Task<Message> {
+    crate::app::update::background_task(
+        crate::t!("Import Layout as Sheet"),
+        move || {
+            paths
+                .into_iter()
+                .map(|p| {
+                    let read = read_import(&p);
+                    (p, read)
+                })
+                .collect()
+        },
+        move |read| Message::SheetSet(SheetSetMsg::ImportRead(new_form, read)),
+    )
+}
+
+/// The layouts of a drawing that can become sheets, each with the sheet set
+/// it already belongs to: the drawing's sheet link, or this set.
+fn import_rows(
+    path: &Path,
+    layouts: Vec<(String, String)>,
+    link: Option<&SheetSetData>,
+    db: &SheetSetDatabase,
+) -> Vec<ImportRow> {
+    let drawing = path.to_string_lossy().to_string();
+    layouts
+        .into_iter()
+        .map(|(layout, handle)| {
+            let mine = db.sheet_for(&drawing, Some(&layout)).is_some_and(|s| {
+                s.named("Layout").and_then(|r| r.prop("Name")).is_some_and(|n| n.eq_ignore_ascii_case(&layout))
+            });
+            // A layout of this set is taken; one the drawing's sheet link
+            // names for another set is only warned about (still importable).
+            let warn = !mine
+                && link.is_some_and(|l| {
+                    l.layout_name.eq_ignore_ascii_case(&layout)
+                        && !l.sheet_set_file_name.is_empty()
+                        && db.path.as_deref().is_none_or(|p| ss::path_key(p) != ss::path_key(&l.sheet_set_file_name))
+                });
+            ImportRow { drawing: drawing.clone(), layout, handle, on: !mine, taken: mine, warn }
+        })
+        .collect()
+}
+
+/// The layouts of the drawings in a wizard folder (run on a worker thread).
+fn scan_folder(path: &Path) -> Vec<FoundLayout> {
+    let folder = path.to_string_lossy().to_string();
+    let mut files: Vec<PathBuf> = std::fs::read_dir(path)
+        .map(|rd| {
+            rd.filter_map(|e| e.ok().map(|e| e.path()))
+                .filter(|p| p.extension().is_some_and(|x| x.eq_ignore_ascii_case("dwg")))
+                .collect()
+        })
+        .unwrap_or_default();
+    files.sort();
+    let mut found = Vec::new();
+    for file in files {
+        let Ok(doc) = crate::io::load_file(&file) else {
+            continue;
+        };
+        for (layout, handle) in paper_layouts(&doc) {
+            found.push(FoundLayout {
+                folder: folder.clone(),
+                file: file.to_string_lossy().to_string(),
+                layout,
+                handle,
+                on: true,
+            });
+        }
+    }
+    found
+}
+
+/// Rename & Renumber: layout and file names follow the options.
+fn follow_rename(f: &mut Form) {
+    let name = |prefix: bool| if prefix { format!("{} {}", f.number.trim(), f.title.trim()).trim().to_string() } else { f.title.trim().to_string() };
+    if f.rename[0] {
+        f.layout_name = name(f.rename[1]);
+    }
+    if f.rename[2] {
+        f.file_name = format!("{}.dwg", name(f.rename[3]));
+    }
+}
+
+fn view_form(db: &SheetSetDatabase, set: usize, id: &str) -> Form {
+    let el = db.find(id);
+    Form {
+        kind: FormKind::RenameView,
+        set,
+        component: id.to_string(),
+        number: el.and_then(|e| e.prop("Number")).unwrap_or("").to_string(),
+        title: el.and_then(|e| e.prop("Title")).unwrap_or("").to_string(),
+        ..Form::default()
+    }
+}
+
+fn rename_form(db: &SheetSetDatabase, set: usize, id: &str) -> Form {
+    let el = db.find(id);
+    let reference = db.layout_reference(id, "Layout").unwrap_or_default();
+    let file = Path::new(&reference.file_name);
+    Form {
+        kind: FormKind::Rename,
+        set,
+        component: id.to_string(),
+        number: el.and_then(|e| e.prop("Number")).unwrap_or("").to_string(),
+        title: el.and_then(|e| e.prop("Title")).unwrap_or("").to_string(),
+        layout_name: reference.name.clone(),
+        file_name: file.file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_default(),
+        folder: file.parent().map(|p| p.to_string_lossy().to_string()).unwrap_or_default(),
+        ..Form::default()
+    }
+}
+
+/// Template of a component for new sheets: its own `DefDwtLayout`, else
+/// the nearest parent's.
+fn template_of(db: &SheetSetDatabase, component: &str) -> Option<LayoutReference> {
+    let mut id = component.to_string();
+    for _ in 0..32 {
+        if let Some(t) = db.layout_reference(&id, "DefDwtLayout") {
+            return Some(t);
+        }
+        id = db.parent_of(&id)?.id().to_string();
+    }
+    None
+}
+
+/// New sheet folder of a component: its `NewSheetLocation`, else the
+/// nearest parent's, else the `.dst` folder.
+fn sheet_folder_of(db: &SheetSetDatabase, component: &str) -> String {
+    let mut id = component.to_string();
+    for _ in 0..32 {
+        if let Some(f) = db.file_reference(&id, "NewSheetLocation").filter(|f| !f.is_empty()) {
+            return f;
+        }
+        match db.parent_of(&id) {
+            Some(p) => id = p.id().to_string(),
+            None => break,
+        }
+    }
+    db.path.as_deref().map(folder_of).unwrap_or_default()
+}
+
+impl OpenCADStudio {
+    pub(super) fn dispatch_sheet_set(&mut self, cmd: &str, i: usize) -> Option<Task<Message>> {
+        let upper = cmd.trim().to_ascii_uppercase();
+        let (verb, arg) = match upper.split_once(char::is_whitespace) {
+            Some((v, _)) => (v.to_string(), cmd.trim()[v.len()..].trim().to_string()),
+            None => (upper.clone(), String::new()),
+        };
+        match verb.as_str() {
+            "SHEETSET" | "SSM" => {
+                self.show_sheet_set_manager(true);
+                Some(Task::none())
+            }
+            "SHEETSETHIDE" => {
+                self.show_sheet_set_manager(false);
+                Some(Task::none())
+            }
+            // The ribbon toggle (its macro picks SHEETSET or SHEETSETHIDE by SSMSTATE).
+            "_SSMTOGGLE" => {
+                let on = !self.sheet_set.show;
+                self.show_sheet_set_manager(on);
+                Some(Task::none())
+            }
+            "NEWSHEETSET" => {
+                self.open_new_sheet_set_wizard();
+                Some(Task::none())
+            }
+            "_SSMPLACEPOINT" => {
+                let v: Vec<f64> = arg.split_whitespace().filter_map(|t| t.parse().ok()).collect();
+                if let [x, y, scale] = v[..] {
+                    self.place_at(i, x, y, scale);
+                }
+                Some(Task::none())
+            }
+            "OPENSHEETSET" => {
+                if !arg.is_empty() {
+                    return Some(self.update(Message::SheetSet(SheetSetMsg::OpenPicked(Some(PathBuf::from(
+                        arg.trim_matches('"'),
+                    ))))));
+                }
+                Some(Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Open Sheet Set").as_ref())
+                            .add_filter(crate::t!("Sheet Set (*.dst)").as_ref(), &["dst", "DST"])
+                            .pick_file()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::OpenPicked(p)),
+                ))
+            }
+            _ => self.dispatch_sheet_set_vars(cmd, i),
+        }
+    }
+
+    fn dispatch_sheet_set_vars(&mut self, cmd: &str, _i: usize) -> Option<Task<Message>> {
+        let cmd = cmd.trim();
+        let rest = match cmd.get(..7) {
+            Some(prefix) if prefix.eq_ignore_ascii_case("SETVAR ") => cmd[7..].trim(),
+            _ => cmd,
+        };
+        let mut parts = rest.splitn(2, char::is_whitespace);
+        let name = parts.next().unwrap_or("").to_ascii_uppercase();
+        if !SHEET_SET_SYSVARS.contains(&name.as_str()) {
+            return None;
+        }
+        let value = parts.next().map(str::trim).filter(|v| !v.is_empty());
+        let s = &mut self.sheet_set.settings;
+        match name.as_str() {
+            "SSMSTATE" => {
+                let v = u8::from(self.sheet_set.show);
+                self.command_line.push_output(&format!("SSMSTATE = {v} ({})", crate::t!("Read-only")));
+            }
+            "SSFOUND" => {
+                let v = self.sheet_set.found.clone();
+                self.command_line.push_output(&format!("SSFOUND = \"{v}\" ({})", crate::t!("Read-only")));
+            }
+            _ => {
+                let (current, min, max) = match name.as_str() {
+                    "SSMAUTOOPEN" => (i32::from(s.auto_open), 0, 1),
+                    "SSLOCATE" => (i32::from(s.locate), 0, 1),
+                    "SSMPOLLTIME" => (i32::from(s.poll_time), 20, 600),
+                    _ => (i32::from(s.sheet_status), 0, 2),
+                };
+                let ask = |app: &mut Self, name: String| {
+                    app.command_line.push_output(&crate::tf!("Enter new value for {name} <{current}>:"));
+                    app.pending_setvar = Some(name);
+                };
+                match value {
+                    None => ask(self, name),
+                    Some(v) => match v.parse::<i32>() {
+                        Ok(n) if !(min..=max).contains(&n) => {
+                            self.command_line.push_error(&if max == 1 {
+                                crate::t!("Requires 0 or 1").into_owned()
+                            } else {
+                                crate::tf!("Requires an integer between {min} and {max}.").into_owned()
+                            });
+                            ask(self, name);
+                        }
+                        Err(_) => {
+                            self.command_line.push_error(&crate::tf!("Requires an integer between {min} and {max}."));
+                            ask(self, name);
+                        }
+                        Ok(n) => {
+                            let s = &mut self.sheet_set.settings;
+                            match name.as_str() {
+                                "SSMAUTOOPEN" => s.auto_open = n as u8,
+                                "SSLOCATE" => s.locate = n as u8,
+                                "SSMPOLLTIME" => s.poll_time = n as u16,
+                                _ => s.sheet_status = n as u8,
+                            }
+                            self.persist_settings_if_changed();
+                        }
+                    },
+                }
+            }
+        }
+        Some(Task::none())
+    }
+
+    /// Show or hide the palette (docked on the right like the other
+    /// managers).
+    pub(in crate::app) fn show_sheet_set_manager(&mut self, on: bool) {
+        let id = crate::ui::dock::PanelId::SheetSetManager;
+        self.sheet_set.show = on;
+        self.ribbon.set_sheet_set(on);
+        if on {
+            if self.dock.location(id).is_none() {
+                self.dock.dock(id, crate::app::config::DockSide::Right, usize::MAX);
+            }
+            self.dock_expanded = Some(id);
+        } else if self.dock_expanded == Some(id) {
+            self.dock_expanded = None;
+        }
+    }
+
+    /// Publish the open sets to the field engine and redraw every field.
+    fn sheet_sets_changed(&mut self) {
+        crate::entities::field::set_sheet_sets(self.sheet_set.sets.clone());
+        self.sync_drawing_locks();
+        self.refresh_locations();
+        if self.sheet_set.settings.sheet_status >= 1 {
+            self.refresh_sheet_status();
+        } else {
+            self.sheet_set.status.clear();
+        }
+        for tab in &mut self.tabs {
+            if refresh_sheet_fields(&mut tab.scene) {
+                tab.dirty = true;
+            }
+        }
+    }
+
+    /// Open (or bring forward) the sheet set in `path`.
+    pub(in crate::app) fn open_sheet_set(&mut self, path: &Path, show: bool) -> Result<(), String> {
+        let key = ss::path_key(&path.to_string_lossy());
+        if let Some(k) = self
+            .sheet_set
+            .sets
+            .iter()
+            .position(|db| db.path.as_deref().is_some_and(|p| ss::path_key(p) == key))
+        {
+            self.sheet_set.current = Some(k);
+        } else {
+            let db = read_set(&path.to_string_lossy())?;
+            self.sheet_set.sets.push(db);
+            self.sheet_set.current = Some(self.sheet_set.sets.len() - 1);
+        }
+        if show {
+            self.show_sheet_set_manager(true);
+        }
+        self.sheet_sets_changed();
+        Ok(())
+    }
+
+    /// Lock files for the sheets of the open sets that are open in tabs, as
+    /// other instances expect them (the sheet status shows such a sheet as
+    /// open). A drawing with someone else's lock file is left alone; a lock
+    /// a crashed session of this application left is taken back. With no set
+    /// open every lock is released.
+    #[cfg(not(target_arch = "wasm32"))]
+    fn sync_drawing_locks(&mut self) {
+        let sets = &self.sheet_set.sets;
+        let open: std::collections::HashSet<PathBuf> = self
+            .tabs
+            .iter()
+            .filter_map(|t| t.current_path.clone())
+            .filter(|p| {
+                let drawing = p.to_string_lossy();
+                sets.iter().any(|db| db.sheet_for(&drawing, None).is_some())
+            })
+            .filter(|p| p.exists())
+            .collect();
+        let gone: Vec<PathBuf> = self.sheet_set.locks.difference(&open).cloned().collect();
+        for p in gone {
+            release_lock(&p);
+            self.sheet_set.locks.remove(&p);
+        }
+        for p in open {
+            if self.sheet_set.locks.contains(&p) || (p.with_extension("dwl").exists() && !stale_own_lock(&p)) {
+                continue;
+            }
+            if write_lock(&p).is_ok() {
+                self.sheet_set.locks.insert(p);
+            }
+        }
+    }
+
+    #[cfg(target_arch = "wasm32")]
+    fn sync_drawing_locks(&mut self) {}
+
+    /// Reload every open set whose `.dst` was changed by someone else.
+    fn poll_sheet_sets(&mut self) {
+        let mut changed = false;
+        for db in &mut self.sheet_set.sets {
+            let Some(path) = db.path.clone() else {
+                continue;
+            };
+            let Ok(modified) = std::fs::metadata(&path).and_then(|m| m.modified()) else {
+                continue;
+            };
+            let key = ss::path_key(&path);
+            if self.sheet_set.seen.insert(key, modified).is_none_or(|t| t == modified) {
+                continue;
+            }
+            if let Ok(fresh) = read_set(&path) {
+                if fresh.root != db.root {
+                    *db = fresh;
+                    changed = true;
+                }
+            }
+        }
+        if changed {
+            self.sheet_sets_changed();
+        }
+    }
+
+    /// Write the current set back to its `.dst`.
+    fn save_current_sheet_set(&mut self) {
+        let Some(db) = self.sheet_set.db_mut() else {
+            return;
+        };
+        let Some(path) = db.path.clone() else {
+            return;
+        };
+        if let Err(e) = write_set(db, &path) {
+            self.command_line.push_error(&format!("{path}: {e}"));
+        }
+        self.sheet_sets_changed();
+    }
+
+    fn open_new_sheet_set_wizard(&mut self) {
+        let mut n = 1;
+        let folder = dirs_next_documents();
+        let name = loop {
+            let name = format!("New Sheet Set ({n})");
+            if !Path::new(&folder).join(format!("{name}.dst")).exists() {
+                break name;
+            }
+            n += 1;
+        };
+        let draft = SheetSetDatabase::new(&name, "");
+        self.sheet_set.dialog = Some(SsDialog::Wizard(Wizard {
+            step: 0,
+            existing: false,
+            name,
+            description: String::new(),
+            folder,
+            hierarchy: false,
+            folders: Vec::new(),
+            layouts: Vec::new(),
+            draft,
+            error: None,
+        }));
+        self.active_modal = Some(crate::app::ModalKind::SheetSet);
+    }
+
+    /// Resolve a palette / automation target: a component id, a sheet
+    /// number or title, a subset name, or `set`.
+    pub(in crate::app) fn sheet_set_target(&self, spec: &str) -> Option<String> {
+        let db = self.sheet_set.db()?;
+        if spec.eq_ignore_ascii_case("set") {
+            return Some(db.sheet_set().id().to_string());
+        }
+        if db.find(spec).is_some() {
+            return Some(spec.to_string());
+        }
+        fn go(el: &ss::Element, spec: &str) -> Option<String> {
+            for c in &el.children {
+                match ComponentKind::of(c) {
+                    Some(ComponentKind::Sheet)
+                        if c.prop("Number") == Some(spec)
+                            || c.prop("Title") == Some(spec)
+                            || ss::number_and_title(c) == spec =>
+                    {
+                        return Some(c.id().to_string())
+                    }
+                    Some(ComponentKind::Subset) => {
+                        if c.prop("Name") == Some(spec) {
+                            return Some(c.id().to_string());
+                        }
+                        if let Some(id) = go(c, spec) {
+                            return Some(id);
+                        }
+                    }
+                    _ => {}
+                }
+            }
+            None
+        }
+        go(db.sheet_set(), spec)
+    }
+
+    fn component_kind(&self, id: &str) -> Option<ComponentKind> {
+        ComponentKind::of(self.sheet_set.db()?.find(id)?)
+    }
+
+    pub(in crate::app) fn on_sheet_set(&mut self, m: SheetSetMsg) -> Task<Message> {
+        match m {
+            SheetSetMsg::PickSet(Some(k)) => {
+                if k < self.sheet_set.sets.len() {
+                    self.sheet_set.current = Some(k);
+                    self.sheet_sets_changed();
+                }
+            }
+            SheetSetMsg::PickSet(None) => return self.dispatch_command("OPENSHEETSET"),
+            SheetSetMsg::Tab(t) => self.sheet_set.tab = t,
+            SheetSetMsg::Expand(id) => {
+                if !self.sheet_set.collapsed.remove(&id) {
+                    self.sheet_set.collapsed.insert(id);
+                }
+            }
+            SheetSetMsg::Select(id) => self.sheet_set.selected = Some(id),
+            SheetSetMsg::Activate(id) => {
+                self.sheet_set.selected = Some(id.clone());
+                if self.component_kind(&id) == Some(ComponentKind::Sheet) {
+                    return self.open_sheet(&id);
+                }
+                if !self.sheet_set.collapsed.remove(&id) {
+                    self.sheet_set.collapsed.insert(id);
+                }
+            }
+            SheetSetMsg::Poll => {
+                self.sync_drawing_locks();
+                self.poll_sheet_sets();
+                // SSMSHEETSTATUS 2: the status is taken again every SSMPOLLTIME seconds.
+                let every = iced::time::Duration::from_secs(u64::from(self.sheet_set.settings.poll_time.max(20)));
+                if self.sheet_set.settings.sheet_status == 2 && self.sheet_set.status_at.is_none_or(|t| t.elapsed() >= every) {
+                    self.refresh_sheet_status();
+                }
+            }
+            SheetSetMsg::BrowseDrawings => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Select Drawing").as_ref())
+                            .add_filter(crate::t!("Drawing (*.dwg)").as_ref(), &["dwg", "DWG"])
+                            .pick_files()
+                            .await
+                            .map(|hs| hs.iter().map(crate::sys::handle_path).collect::<Vec<_>>())
+                            .unwrap_or_default()
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::ImportAdd(p)),
+                )
+            }
+            SheetSetMsg::ImportAdd(paths) if !paths.is_empty() => return read_imports(paths, false),
+            SheetSetMsg::ImportAdd(_) => {}
+            SheetSetMsg::ImportRead(new_form, read) => self.import_read(new_form, read),
+            SheetSetMsg::FolderScanned(path, found) => self.folder_scanned(path, found),
+            SheetSetMsg::DrawingRead(path, read, then) => match read.0 {
+                Ok((modified, doc)) => {
+                    self.sheet_set.drawings.insert(&path, modified, doc);
+                    return self.on_sheet_set(*then);
+                }
+                Err(e) => self.command_line.push_error(&format!("{path}: {e}")),
+            },
+            SheetSetMsg::Previous => self.rename_step(false),
+            SheetSetMsg::Next => self.rename_step(true),
+            SheetSetMsg::ViewsByCategory(v) => self.sheet_set.by_category = v,
+            SheetSetMsg::NewCategory => self.open_category(None),
+            SheetSetMsg::CategoryProperties(id) => self.open_category(Some(id)),
+            SheetSetMsg::CategoryRemove(id) => {
+                if let Some(db) = self.sheet_set.db_mut() {
+                    db.remove(&id);
+                }
+                self.save_current_sheet_set();
+            }
+            SheetSetMsg::AddBlocks => {
+                if let Some(SsDialog::Category(c)) = self.sheet_set.dialog.take() {
+                    let blocks = c.blocks.iter().map(|(id, label, _)| (id.clone(), label.clone())).collect();
+                    self.sheet_set.dialog = Some(SsDialog::BlockList(BlockList { category: Box::new(c), blocks, selected: None, preview: None }));
+                }
+            }
+            SheetSetMsg::BlocksPicked(_) | SheetSetMsg::LocationPicked(None) => {}
+            SheetSetMsg::Submenu(key) => self.sheet_set.submenu = key,
+            SheetSetMsg::BlockListSelect(k) => {
+                let target = match self.sheet_set.dialog.as_ref() {
+                    Some(SsDialog::BlockList(b)) => b.blocks.get(k).and_then(|(id, _)| self.listed_block(b.category.set, id)),
+                    _ => None,
+                };
+                // A whole drawing taken as a block shows its model space.
+                let mut preview = None;
+                if let Some((file, name)) = target {
+                    let whole = match self.drawing_or_read(&file, SheetSetMsg::BlockListSelect(k)) {
+                        Ok(doc) => doc.block_records.get(&name).is_none(),
+                        Err(task) => return task,
+                    };
+                    preview = self.block_preview(&file, if whole { "" } else { &name });
+                }
+                if let Some(SsDialog::BlockList(b)) = self.sheet_set.dialog.as_mut() {
+                    b.selected = Some(k);
+                    b.preview = preview;
+                }
+            }
+            SheetSetMsg::BlockListDelete => {
+                if let Some(SsDialog::BlockList(b)) = self.sheet_set.dialog.as_mut() {
+                    if let Some(k) = b.selected.take().filter(|k| *k < b.blocks.len()) {
+                        b.blocks.remove(k);
+                    }
+                }
+            }
+            SheetSetMsg::BlockListAdd => {
+                if let Some(SsDialog::BlockList(b)) = self.sheet_set.dialog.take() {
+                    self.sheet_set.dialog = Some(SsDialog::SelectBlock(SelectBlock {
+                        list: Box::new(b),
+                        file: String::new(),
+                        whole: true,
+                        names: Vec::new(),
+                        preview: None,
+                        error: None,
+                    }));
+                }
+            }
+            SheetSetMsg::SelectBlockBrowse => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Select Drawing").as_ref())
+                            .add_filter(crate::t!("Drawing (*.dwg)").as_ref(), &["dwg", "DWG", "dwt", "DWT"])
+                            .pick_file()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::SelectBlockPicked(p)),
+                )
+            }
+            SheetSetMsg::SelectBlockPicked(None) => {}
+            SheetSetMsg::SelectBlockPicked(Some(path)) => return self.select_block_file(path),
+            SheetSetMsg::SelectBlockWhole(v) => {
+                let file = match self.sheet_set.dialog.as_ref() {
+                    Some(SsDialog::SelectBlock(b)) => b.file.clone(),
+                    _ => String::new(),
+                };
+                let preview = if v && !file.is_empty() { self.block_preview(&file, "") } else { None };
+                if let Some(SsDialog::SelectBlock(b)) = self.sheet_set.dialog.as_mut() {
+                    b.whole = v;
+                    b.preview = preview;
+                }
+            }
+            SheetSetMsg::SelectBlockCheck(k, v) => {
+                let picked = match self.sheet_set.dialog.as_ref() {
+                    Some(SsDialog::SelectBlock(b)) => b.names.get(k).map(|n| (b.file.clone(), n.0.clone())),
+                    _ => None,
+                };
+                // The block just checked is previewed.
+                let preview = picked.and_then(|(file, name)| self.block_preview(&file, &name));
+                if let Some(SsDialog::SelectBlock(b)) = self.sheet_set.dialog.as_mut() {
+                    if let Some(n) = b.names.get_mut(k) {
+                        n.2 = v;
+                    }
+                    b.preview = preview;
+                }
+            }
+            SheetSetMsg::ToggleDrawing(path) => {
+                if !self.sheet_set.open_drawings.remove(&ss::path_key(&path)) {
+                    return self.on_sheet_set(SheetSetMsg::SeeViews(path));
+                }
+            }
+            SheetSetMsg::SeeViews(path) => {
+                if let Err(task) = self.load_model_views(&path) {
+                    return task;
+                }
+                self.sheet_set.open_drawings.insert(ss::path_key(&path));
+            }
+            SheetSetMsg::PlaceOnSheet(path, view) => return self.start_place_view(path, view),
+            SheetSetMsg::ViewMenu(id, action) => {
+                self.sheet_set.submenu = None;
+                return self.view_menu(id, action);
+            }
+            // Browsers expose no folder picker.
+            #[cfg(target_arch = "wasm32")]
+            SheetSetMsg::AddLocation | SheetSetMsg::Browse(_) => {}
+            #[cfg(not(target_arch = "wasm32"))]
+            SheetSetMsg::AddLocation => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Browse for Folder").as_ref())
+                            .pick_folder()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::LocationPicked(p)),
+                )
+            }
+            SheetSetMsg::LocationPicked(Some(path)) => {
+                if let Some(db) = self.sheet_set.db_mut() {
+                    db.add_resource(&path.to_string_lossy());
+                }
+                self.save_current_sheet_set();
+            }
+            SheetSetMsg::RemoveLocation(id) => {
+                if let Some(db) = self.sheet_set.db_mut() {
+                    db.remove(&id);
+                }
+                self.save_current_sheet_set();
+            }
+            SheetSetMsg::OpenDrawing(path) => return self.update(Message::OpenRecent(PathBuf::from(path))),
+            SheetSetMsg::Refresh => {
+                if let Some(path) = self.sheet_set.db().and_then(|db| db.path.clone()) {
+                    match read_set(&path) {
+                        Ok(db) => {
+                            if let Some(slot) = self.sheet_set.db_mut() {
+                                *slot = db;
+                            }
+                            self.sheet_sets_changed();
+                        }
+                        Err(e) => self.command_line.push_error(&format!("{path}: {e}")),
+                    }
+                }
+            }
+            SheetSetMsg::Menu(id, action) => return self.sheet_set_menu(id, action),
+            SheetSetMsg::OpenPicked(Some(path)) => {
+                if let Err(e) = self.open_sheet_set(&path, true) {
+                    self.command_line.push_error(&format!("{}: {e}", path.display()));
+                }
+            }
+            SheetSetMsg::OpenPicked(None) | SheetSetMsg::ImportPicked(None) | SheetSetMsg::TemplatePicked(None) => {}
+            SheetSetMsg::ImportPicked(Some(path)) => return read_imports(vec![path], true),
+            SheetSetMsg::FolderPicked(field, Some(path)) => return self.dialog_folder(field, path),
+            SheetSetMsg::FolderPicked(_, None) => {}
+            SheetSetMsg::TemplatePicked(Some(path)) => return self.properties_template(path),
+            #[cfg(not(target_arch = "wasm32"))]
+            SheetSetMsg::Browse(field) => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Browse for Folder").as_ref())
+                            .pick_folder()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    move |p| Message::SheetSet(SheetSetMsg::FolderPicked(field, p)),
+                )
+            }
+            SheetSetMsg::BrowseTemplate => {
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Select Layout as Sheet Template").as_ref())
+                            .add_filter(crate::t!("Drawing Template (*.dwt)").as_ref(), &["dwt", "DWT"])
+                            .add_filter(crate::t!("Drawing (*.dwg)").as_ref(), &["dwg", "DWG"])
+                            .pick_file()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::TemplatePicked(p)),
+                )
+            }
+            SheetSetMsg::Input(field, v) => self.dialog_input(field, v),
+            SheetSetMsg::Toggle(field, v) => {
+                let parent_folder = match self.sheet_set.dialog.as_ref() {
+                    Some(SsDialog::Form(f)) if f.kind == FormKind::NewSubset => {
+                        self.sheet_set.sets.get(f.set).map(|db| sheet_folder_of(db, &f.component)).unwrap_or_default()
+                    }
+                    _ => String::new(),
+                };
+                match (field, self.sheet_set.dialog.as_mut()) {
+                    (FieldId::Hierarchy, Some(SsDialog::Wizard(w))) => w.hierarchy = v,
+                    (FieldId::Hierarchy, Some(SsDialog::Form(f))) => {
+                        f.hierarchy = v;
+                        f.folder = if v { Path::new(&parent_folder).join(f.title.trim()).to_string_lossy().to_string() } else { parent_folder };
+                    }
+                    (FieldId::Publish, Some(SsDialog::Form(f))) => f.publish = v,
+                    (FieldId::OpenAfter, Some(SsDialog::Form(f))) => f.open_after = v,
+                    (FieldId::ImportPrefix, Some(SsDialog::Form(f))) => f.prefix = v,
+                    (FieldId::ImportRow(k), Some(SsDialog::Form(f))) => {
+                        if let Some(r) = f.rows.get_mut(k) {
+                            r.on = v && !r.taken;
+                        }
+                    }
+                    (FieldId::RenameOption(k), Some(SsDialog::Form(f))) => {
+                        f.rename[k] = v;
+                        // A prefix needs its "Sheet title" option.
+                        if !f.rename[0] {
+                            f.rename[1] = false;
+                        }
+                        if !f.rename[2] {
+                            f.rename[3] = false;
+                        }
+                        follow_rename(f);
+                    }
+                    (FieldId::CategoryBlock(k), Some(SsDialog::Category(c))) => {
+                        if let Some(b) = c.blocks.get_mut(k) {
+                            b.2 = v;
+                        }
+                    }
+                    (FieldId::Row(r), Some(SsDialog::Properties(p))) => {
+                        if let Some(row) = p.rows.get_mut(r) {
+                            row.value = if v { "Publish by Sheet 'Include for Publish' Setting" } else { "Do Not Publish Sheets" }.into();
+                        }
+                    }
+                    _ => {}
+                }
+            }
+            SheetSetMsg::Choose(field, k) => match (field, self.sheet_set.dialog.as_mut()) {
+                (FieldId::Layout, Some(SsDialog::Template(t))) => t.layout = k,
+                (FieldId::CustomOwner, Some(SsDialog::Properties(p))) => {
+                    if let Some(a) = p.adding.as_mut() {
+                        a.2 = k == 1;
+                    }
+                }
+                (FieldId::Row(r), Some(SsDialog::Properties(p))) => {
+                    if let Some(row) = p.rows.get_mut(r) {
+                        row.value = if k == 0 { "Yes" } else { "No" }.into();
+                    }
+                }
+                _ => {}
+            },
+            SheetSetMsg::Wizard(w) => self.on_wizard(w),
+            SheetSetMsg::WizardProperties => {
+                if let Some(SsDialog::Wizard(mut w)) = self.sheet_set.dialog.take() {
+                    sync_wizard_draft(&mut w);
+                    let set = w.draft.sheet_set().id().to_string();
+                    let mut p = build_properties(&w.draft, &set, None);
+                    // The set is not written yet: show where it will be.
+                    for row in &mut p.rows {
+                        match row.key {
+                            RowKey::ReadOnly if row.label == "Sheet set data file" => {
+                                row.value = crate::ui::window::sheet_set::wizard_dst_path(&w)
+                            }
+                            RowKey::Folder(_) if row.value.is_empty() => row.value = w.folder.clone(),
+                            _ => {}
+                        }
+                    }
+                    p.wizard = Some(Box::new(w));
+                    self.sheet_set.dialog = Some(SsDialog::Properties(p));
+                }
+            }
+            SheetSetMsg::AddCustom => {
+                if let Some(SsDialog::Properties(p)) = self.sheet_set.dialog.as_mut() {
+                    let mut n = 1;
+                    while p.custom.iter().any(|(name, _, _)| *name == format!("New Name ({n})")) {
+                        n += 1;
+                    }
+                    p.adding = Some((format!("New Name ({n})"), "Value".into(), false));
+                }
+            }
+            SheetSetMsg::AddCustomCancel => {
+                if let Some(SsDialog::Properties(p)) = self.sheet_set.dialog.as_mut() {
+                    p.adding = None;
+                }
+            }
+            SheetSetMsg::AddCustomOk => {
+                if let Some(SsDialog::Properties(p)) = self.sheet_set.dialog.as_mut() {
+                    if let Some((name, value, sheet)) = p.adding.take() {
+                        let name = name.trim().to_string();
+                        if name.is_empty() {
+                            p.error = Some(crate::t!("The name cannot be empty.").into_owned());
+                        } else if p.custom.iter().any(|(n, _, _)| n.eq_ignore_ascii_case(&name)) {
+                            p.error = Some(crate::t!("A custom property with this name already exists.").into_owned());
+                        } else {
+                            p.error = None;
+                            let flags = if sheet { ss::CUSTOM_SHEET_PROP } else { ss::CUSTOM_SHEET_SET_PROP };
+                            p.custom.push((name, value, flags));
+                        }
+                    }
+                }
+            }
+            SheetSetMsg::CustomValue(k, v) => {
+                if let Some(SsDialog::Properties(p)) = self.sheet_set.dialog.as_mut() {
+                    if let Some(c) = p.custom.get_mut(k) {
+                        c.1 = v;
+                    }
+                }
+            }
+            SheetSetMsg::Ok => return self.sheet_set_dialog_ok(),
+            SheetSetMsg::Cancel => self.close_sheet_set_dialog(),
+            SheetSetMsg::Help => self.command_line.push_info(
+                crate::t!("Sheet sets organize layouts from several drawings into one named set of sheets.").as_ref(),
+            ),
+        }
+        Task::none()
+    }
+
+    /// Cancel / × of the sheet set dialogs: the Properties dialog opened from
+    /// the wizard goes back to it.
+    pub(in crate::app) fn close_sheet_set_dialog(&mut self) {
+        match self.sheet_set.dialog.take() {
+            Some(SsDialog::BlockList(b)) => self.sheet_set.dialog = Some(SsDialog::Category(*b.category)),
+            Some(SsDialog::SelectBlock(b)) => self.sheet_set.dialog = Some(SsDialog::BlockList(*b.list)),
+            Some(SsDialog::Properties(p)) if p.wizard.is_some() => {
+                self.sheet_set.dialog = p.wizard.map(|w| SsDialog::Wizard(*w));
+            }
+            _ => self.close_active_modal(),
+        }
+    }
+
+    fn sheet_set_menu(&mut self, id: String, action: MenuAction) -> Task<Message> {
+        let Some(set) = self.sheet_set.current else {
+            return Task::none();
+        };
+        self.sheet_set.selected = Some(id.clone());
+        let Some(db) = self.sheet_set.db() else {
+            return Task::none();
+        };
+        // On a sheet, New Sheet and Import work on the subset holding it.
+        let id = match action {
+            MenuAction::NewSheet | MenuAction::ImportLayout
+                if db.find(&id).and_then(ComponentKind::of) == Some(ComponentKind::Sheet) =>
+            {
+                db.parent_of(&id).map_or(id, |p| p.id().to_string())
+            }
+            _ => id,
+        };
+        match action {
+            MenuAction::Open => return self.open_sheet(&id),
+            MenuAction::NewSheet => {
+                let template = template_of(db, &id);
+                let form = Form {
+                    kind: FormKind::NewSheet,
+                    set,
+                    component: id.clone(),
+                    folder: sheet_folder_of(db, &id),
+                    drawing: template
+                        .as_ref()
+                        .map(|t| format!("{} ({})", t.name, t.file_name))
+                        .unwrap_or_else(|| crate::t!("(default new drawing)").into_owned()),
+                    ..Form::default()
+                };
+                // A subset that prompts for its template asks for it first.
+                if prompts_for_template(db, &id) {
+                    let file = template.map(|t| t.file_name).unwrap_or_default();
+                    let layouts = if Path::new(&file).is_file() {
+                        match self.drawing_or_read(&file, SheetSetMsg::Menu(id.clone(), MenuAction::NewSheet)) {
+                            Ok(doc) => paper_layouts(&doc).into_iter().map(|(n, _)| n).collect(),
+                            Err(task) => return task,
+                        }
+                    } else {
+                        Vec::new()
+                    };
+                    self.sheet_set.dialog = Some(SsDialog::Template(TemplatePick { form, file, layouts, layout: 0 }));
+                } else {
+                    self.sheet_set.dialog = Some(SsDialog::Form(form));
+                }
+                self.active_modal = Some(crate::app::ModalKind::SheetSet);
+            }
+            MenuAction::NewSubset => {
+                let mut n = 1;
+                let parent = db.find(&id);
+                while parent.is_some_and(|p| {
+                    p.children.iter().any(|c| c.prop("Name") == Some(format!("New Subset ({n})").as_str()))
+                }) {
+                    n += 1;
+                }
+                self.sheet_set.dialog = Some(SsDialog::Form(Form {
+                    kind: FormKind::NewSubset,
+                    set,
+                    component: id.clone(),
+                    title: format!("New Subset ({n})"),
+                    folder: sheet_folder_of(db, &id),
+                    publish: true,
+                    ..Form::default()
+                }));
+                self.active_modal = Some(crate::app::ModalKind::SheetSet);
+            }
+            MenuAction::ImportLayout => {
+                self.sheet_set_import_parent = Some(id);
+                return Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Select Drawing").as_ref())
+                            .add_filter(crate::t!("Drawing (*.dwg)").as_ref(), &["dwg", "DWG"])
+                            .pick_file()
+                            .await
+                            .map(|h| crate::sys::handle_path(&h))
+                    },
+                    |p| Message::SheetSet(SheetSetMsg::ImportPicked(p)),
+                );
+            }
+            MenuAction::Rename => {
+                self.sheet_set.dialog = Some(SsDialog::Form(rename_form(db, set, &id)));
+                self.active_modal = Some(crate::app::ModalKind::SheetSet);
+            }
+            MenuAction::Remove => {
+                // A sheet asks first; a subset can only be removed while empty.
+                if db.find(&id).and_then(ComponentKind::of) == Some(ComponentKind::Sheet) {
+                    let sheet = db.find(&id).map(ss::number_and_title).unwrap_or_default();
+                    let question = crate::tf!("Are you sure that you want to remove {} Sheet from {} Sheet Set?", sheet, db.name()).into_owned();
+                    self.sheet_set.dialog = Some(SsDialog::Confirm(set, id.clone(), question));
+                    self.active_modal = Some(crate::app::ModalKind::SheetSet);
+                } else if db.find(&id).is_some_and(|el| el.children.iter().all(|c| ComponentKind::of(c).is_none())) {
+                    if let Some(db) = self.sheet_set.db_mut() {
+                        db.remove(&id);
+                    }
+                    self.sheet_set.selected = None;
+                    self.save_current_sheet_set();
+                }
+            }
+            MenuAction::Properties => {
+                let p = build_properties(db, &id, Some(set));
+                self.sheet_set.dialog = Some(SsDialog::Properties(p));
+                self.active_modal = Some(crate::app::ModalKind::SheetSet);
+            }
+            MenuAction::Close => {
+                self.sheet_set.sets.remove(set);
+                self.sheet_set.current = (!self.sheet_set.sets.is_empty()).then_some(0);
+                self.sheet_set.selected = None;
+                self.sheet_sets_changed();
+            }
+        }
+        Task::none()
+    }
+
+    /// Open a sheet's drawing (or switch to it) at the sheet's layout.
+    fn open_sheet(&mut self, id: &str) -> Task<Message> {
+        let Some(reference) = self.sheet_set.db().and_then(|db| db.layout_reference(id, "Layout")) else {
+            return Task::none();
+        };
+        let path = PathBuf::from(&reference.file_name);
+        if let Some(k) = self.tab_showing(&path) {
+            return Task::batch([
+                self.update(Message::TabSwitch(k)),
+                Task::done(Message::LayoutSwitch(reference.name)),
+            ]);
+        }
+        if !path.exists() {
+            self.command_line
+                .push_error(crate::tf!("Sheet drawing not found: {}", path.display()).as_ref());
+            return Task::none();
+        }
+        self.sheet_set_pending_layout = Some((ss::path_key(&reference.file_name), reference.name));
+        self.update(Message::OpenRecent(path))
+    }
+
+    /// After a drawing opened: switch to the sheet layout that was asked for,
+    /// and locate the sheet set the drawing names (SSLOCATE / SSMAUTOOPEN).
+    pub(in crate::app) fn sheet_set_after_open(&mut self, i: usize) -> Task<Message> {
+        let mut task = Task::none();
+        // A sheet's fields show its current values once it is open.
+        if !self.sheet_set.sets.is_empty() && refresh_sheet_fields(&mut self.tabs[i].scene) {
+            self.tabs[i].dirty = true;
+        }
+        let path = self.tabs[i].current_path.as_ref().map(|p| p.to_string_lossy().to_string());
+        if let (Some(path), Some((want, layout))) = (path.as_ref(), self.sheet_set_pending_layout.as_ref()) {
+            if ss::path_key(path) == *want {
+                task = Task::done(Message::LayoutSwitch(layout.clone()));
+                self.sheet_set_pending_layout = None;
+                if let Some(view) = self.sheet_set.pending_view.take() {
+                    task = task.chain(Task::done(Message::Command(format!("VIEW RESTORE {view}"))));
+                }
+            }
+        }
+        if self.sheet_set.settings.locate == 1 {
+            if let Some(data) = self.tabs[i].scene.document.sheet_set_data() {
+                let named = PathBuf::from(&data.sheet_set_file_name);
+                // A moved set is looked for next to the drawing.
+                let found = if named.exists() {
+                    Some(named)
+                } else {
+                    path.as_deref().and_then(|p| {
+                        let beside = Path::new(p).parent()?.join(named.file_name()?);
+                        beside.exists().then_some(beside)
+                    })
+                };
+                self.sheet_set.found = found.as_ref().map(|f| f.to_string_lossy().to_string()).unwrap_or_default();
+                if let Some(found) = found {
+                    let show = self.sheet_set.settings.auto_open == 1;
+                    if let Err(e) = self.open_sheet_set(&found, show) {
+                        self.command_line.push_error(&format!("{}: {e}", found.display()));
+                    }
+                }
+            }
+        }
+        task
+    }
+
+    /// Before a native save: a drawing that is a sheet of an open set records
+    /// its link (`AcSheetSetData`), as the reference does when it saves a
+    /// sheet while its set is open.
+    #[cfg(not(target_arch = "wasm32"))]
+    pub(in crate::app) fn stamp_sheet_set_data(&mut self, i: usize) {
+        let Some(path) = self.tabs[i].current_path.as_ref().map(|p| p.to_string_lossy().to_string()) else {
+            return;
+        };
+        let layout = self.tabs[i].scene.current_layout.clone();
+        let layouts = paper_layouts(&self.tabs[i].scene.document);
+        for db in &self.sheet_set.sets {
+            let wanted = (!layout.eq_ignore_ascii_case("Model")).then_some(layout.as_str());
+            let Some(sheet) = db.sheet_for(&path, wanted) else {
+                continue;
+            };
+            let Some(reference) = db.layout_reference(sheet.id(), "Layout") else {
+                continue;
+            };
+            let handle = layouts
+                .iter()
+                .find(|(n, _)| n.eq_ignore_ascii_case(&reference.name))
+                .map(|(_, h)| h.to_lowercase())
+                .unwrap_or_else(|| reference.handle.to_lowercase());
+            let doc = &mut self.tabs[i].scene.document;
+            let previous = doc.sheet_set_data().unwrap_or_default();
+            doc.set_sheet_set_data(&SheetSetData {
+                layout_handle: handle,
+                layout_name: reference.name,
+                sheet_dwg_name: ss::native_path(&path),
+                sheet_set_file_name: ss::native_path(db.path.as_deref().unwrap_or_default()),
+                sheet_set_version: db.file_revision(),
+                update_count: previous.update_count + 1,
+                update_time: utc_stamp(),
+            });
+            return;
+        }
+    }
+
+    fn dialog_input(&mut self, field: FieldId, v: String) {
+        match self.sheet_set.dialog.as_mut() {
+            Some(SsDialog::Wizard(w)) => match field {
+                FieldId::Name => w.name = v,
+                FieldId::Description => w.description = v,
+                FieldId::Folder => w.folder = v,
+                _ => {}
+            },
+            Some(SsDialog::Properties(p)) => match field {
+                FieldId::Row(r) => {
+                    if let Some(row) = p.rows.get_mut(r) {
+                        row.value = v;
+                    }
+                }
+                FieldId::CustomName => {
+                    if let Some(a) = p.adding.as_mut() {
+                        a.0 = v;
+                    }
+                }
+                FieldId::CustomDefault => {
+                    if let Some(a) = p.adding.as_mut() {
+                        a.1 = v;
+                    }
+                }
+                _ => {}
+            },
+            Some(SsDialog::Category(c)) => {
+                if field == FieldId::Name {
+                    c.name = v;
+                }
+            }
+            Some(SsDialog::Confirm(..)) | Some(SsDialog::Template(_)) | Some(SsDialog::BlockList(_)) | Some(SsDialog::SelectBlock(_)) => {}
+            Some(SsDialog::Form(f)) => {
+                let file_follows = f.file_name == format!("{} {}", f.number, f.title).trim();
+                match field {
+                    FieldId::Number => f.number = v,
+                    FieldId::Title => {
+                        // A folder hierarchy follows the subset name.
+                        if f.kind == FormKind::NewSubset && f.hierarchy {
+                            if let Some(parent) = Path::new(&f.folder).parent() {
+                                f.folder = parent.join(v.trim()).to_string_lossy().to_string();
+                            }
+                        }
+                        f.title = v
+                    }
+                    FieldId::FileName => f.file_name = v,
+                    FieldId::Folder => f.folder = v,
+                    FieldId::LayoutName => f.layout_name = v,
+                    _ => {}
+                }
+                if f.kind == FormKind::Rename {
+                    follow_rename(f);
+                }
+                // The file name follows "Number Title" until edited.
+                if f.kind == FormKind::NewSheet && file_follows && field != FieldId::FileName {
+                    f.file_name = format!("{} {}", f.number, f.title).trim().to_string();
+                }
+            }
+            None => {}
+        }
+    }
+
+    fn dialog_folder(&mut self, field: FieldId, path: PathBuf) -> Task<Message> {
+        if field == FieldId::AddFolder {
+            return self.wizard_add_folder(path);
+        }
+        self.dialog_input(field, path.to_string_lossy().to_string());
+        Task::none()
+    }
+
+    /// The wizard's Browse for existing drawings: the folder's drawings are
+    /// read off the UI thread.
+    fn wizard_add_folder(&mut self, path: PathBuf) -> Task<Message> {
+        let Some(SsDialog::Wizard(w)) = self.sheet_set.dialog.as_ref() else {
+            return Task::none();
+        };
+        if w.folders.contains(&path.to_string_lossy().to_string()) {
+            return Task::none();
+        }
+        crate::app::update::background_task(
+            crate::t!("Sheet Set Manager"),
+            move || {
+                let found = scan_folder(&path);
+                (path, found)
+            },
+            |(path, found)| Message::SheetSet(SheetSetMsg::FolderScanned(path, found)),
+        )
+    }
+
+    fn folder_scanned(&mut self, path: PathBuf, found: Vec<FoundLayout>) {
+        let Some(SsDialog::Wizard(w)) = self.sheet_set.dialog.as_mut() else {
+            return;
+        };
+        let folder = path.to_string_lossy().to_string();
+        if !w.folders.contains(&folder) {
+            w.layouts.extend(found);
+            w.folders.push(folder);
+        }
+    }
+
+    fn on_wizard(&mut self, m: WizardMsg) {
+        let Some(SsDialog::Wizard(w)) = self.sheet_set.dialog.as_mut() else {
+            return;
+        };
+        match m {
+            WizardMsg::Step(s) => {
+                w.error = None;
+                if s > 1 && w.step <= 1 {
+                    if w.name.trim().is_empty() {
+                        w.error = Some(crate::t!("The sheet set name cannot be empty.").into_owned());
+                        return;
+                    }
+                    if !Path::new(&w.folder).is_dir() {
+                        w.error = Some(crate::t!("The folder for the sheet set data file does not exist.").into_owned());
+                        return;
+                    }
+                }
+                w.step = if s == 2 && !w.existing { 3 } else { s };
+                sync_wizard_draft(w);
+            }
+            WizardMsg::Existing(on) => w.existing = on,
+            WizardMsg::LayoutOn(k, on) => {
+                if let Some(l) = w.layouts.get_mut(k) {
+                    l.on = on;
+                }
+            }
+            WizardMsg::RemoveFolder(k) => {
+                if k < w.folders.len() {
+                    let folder = w.folders.remove(k);
+                    w.layouts.retain(|l| l.folder != folder);
+                }
+            }
+        }
+    }
+
+    /// The drawings picked for Import, read: a new Import dialog for the
+    /// subset whose menu asked, or the open dialog's rows replaced.
+    fn import_read(&mut self, new_form: bool, read: Vec<(PathBuf, ImportRead)>) {
+        let set = match self.sheet_set.dialog.as_ref() {
+            _ if new_form => self.sheet_set.current,
+            Some(SsDialog::Form(f)) => Some(f.set),
+            _ => None,
+        };
+        let Some(db) = set.and_then(|k| self.sheet_set.sets.get(k)) else { return };
+        let mut rows = Vec::new();
+        let mut errors = Vec::new();
+        for (path, r) in read {
+            match r {
+                Ok((layouts, link)) => rows.extend(import_rows(&path, layouts, link.as_ref(), db)),
+                Err(e) => errors.push(format!("{}: {e}", path.display())),
+            }
+        }
+        let failed = !errors.is_empty();
+        for e in errors {
+            self.command_line.push_error(&e);
+        }
+        if !new_form {
+            // The drawings picked replace the list.
+            if let Some(SsDialog::Form(f)) = self.sheet_set.dialog.as_mut() {
+                if !rows.is_empty() {
+                    f.rows = rows;
+                }
+            }
+            return;
+        }
+        let (Some(set), Some(parent)) = (set, self.sheet_set_import_parent.take()) else {
+            return;
+        };
+        if failed {
+            return;
+        }
+        self.sheet_set.dialog = Some(SsDialog::Form(Form {
+            kind: FormKind::ImportLayout,
+            set,
+            component: parent,
+            rows,
+            prefix: true,
+            ..Form::default()
+        }));
+        self.active_modal = Some(crate::app::ModalKind::SheetSet);
+    }
+
+    /// Rename & Renumber: number and title into the set, and the layout and
+    /// drawing file renamed when they changed.
+    fn apply_rename(&mut self, f: &Form) -> Result<(), String> {
+        let Some(db) = self.sheet_set.sets.get(f.set) else { return Ok(()) };
+        let old = db.layout_reference(&f.component, "Layout").unwrap_or_default();
+        let new_layout = f.layout_name.trim().to_string();
+        let new_file = if old.file_name.is_empty() || f.file_name.trim().is_empty() {
+            old.file_name.clone()
+        } else {
+            Path::new(&f.folder).join(f.file_name.trim()).to_string_lossy().to_string()
+        };
+        let file_changed = !old.file_name.is_empty() && ss::path_key(&new_file) != ss::path_key(&old.file_name);
+        let layout_changed = !old.name.is_empty() && !new_layout.is_empty() && new_layout != old.name;
+        let open_tab = self.tab_showing(Path::new(&old.file_name));
+        if file_changed {
+            if open_tab.is_some() {
+                return Err(crate::t!("The drawing is open; close it to rename its file.").into_owned());
+            }
+            if Path::new(&new_file).exists() {
+                return Err(crate::tf!("{} already exists.", new_file).into_owned());
+            }
+        }
+        if layout_changed {
+            match open_tab {
+                Some(k) => {
+                    self.push_undo_snapshot(k, "LAYOUT RENAME");
+                    let scene = &mut self.tabs[k].scene;
+                    scene.rename_layout(&old.name, &new_layout);
+                    if scene.current_layout == old.name {
+                        scene.set_current_layout(new_layout.clone());
+                    }
+                    if let Some(mut link) = scene.document.sheet_set_data() {
+                        link.layout_name = new_layout.clone();
+                        scene.document.set_sheet_set_data(&link);
+                    }
+                    self.tabs[k].dirty = true;
+                }
+                None => {
+                    // The closed drawing is read and written back whole: its
+                    // previous file is kept as `.bak`, as a save over it does.
+                    let path = Path::new(&old.file_name);
+                    let mut scene = crate::scene::Scene::new();
+                    scene.document = crate::io::load_file(path).map_err(|e| e.to_string())?;
+                    scene.rename_layout(&old.name, &new_layout);
+                    if let Some(mut link) = scene.document.sheet_set_data() {
+                        link.layout_name = new_layout.clone();
+                        scene.document.set_sheet_set_data(&link);
+                    }
+                    if self.backup_on_save {
+                        crate::io::write_backup(path);
+                    }
+                    crate::io::save(&scene.document, path).map_err(|e| e.to_string())?;
+                }
+            }
+        }
+        if file_changed {
+            std::fs::rename(&old.file_name, &new_file).map_err(|e| e.to_string())?;
+        }
+        let Some(db) = self.sheet_set.sets.get_mut(f.set) else { return Ok(()) };
+        if let Some(el) = db.find_mut(&f.component) {
+            el.set_prop("Number", f.number.trim());
+            el.set_prop("Title", f.title.trim());
+        }
+        if layout_changed || file_changed {
+            db.set_layout_reference(
+                &f.component,
+                "Layout",
+                &LayoutReference {
+                    file_name: ss::native_path(&new_file),
+                    name: if layout_changed { new_layout } else { old.name },
+                    handle: old.handle,
+                },
+            );
+        }
+        Ok(())
+    }
+
+    /// Rename & Renumber < Previous / Next >: apply, then the neighbouring sheet.
+    fn rename_step(&mut self, forward: bool) {
+        let Some(SsDialog::Form(f)) = self.sheet_set.dialog.take() else { return };
+        if f.kind == FormKind::RenameView {
+            let Some(db) = self.sheet_set.sets.get_mut(f.set) else { return };
+            if let Some(el) = db.find_mut(&f.component) {
+                if f.number.trim().is_empty() {
+                    el.remove_named("Number");
+                } else {
+                    el.set_prop("Number", f.number.trim());
+                }
+                el.set_prop("Title", f.title.trim());
+            }
+            let ids: Vec<String> = db.sheets().into_iter().flat_map(|s| db.sheet_views(s)).map(|v| v.id().to_string()).collect();
+            let k = ids.iter().position(|i| *i == f.component).unwrap_or(0);
+            let next = if forward { (k + 1).min(ids.len().saturating_sub(1)) } else { k.saturating_sub(1) };
+            let form = ids.get(next).map(|id| view_form(db, f.set, id));
+            self.sheet_set.current = Some(f.set);
+            self.save_current_sheet_set();
+            match form {
+                Some(form) => self.sheet_set.dialog = Some(SsDialog::Form(form)),
+                None => self.close_active_modal(),
+            }
+            return;
+        }
+        if let Err(e) = self.apply_rename(&f) {
+            self.sheet_set.dialog = Some(SsDialog::Form(Form { error: Some(e), ..f }));
+            return;
+        }
+        self.sheet_set.current = Some(f.set);
+        self.save_current_sheet_set();
+        let Some(db) = self.sheet_set.sets.get(f.set) else { return };
+        let ids: Vec<String> = db.sheets().iter().map(|s| s.id().to_string()).collect();
+        let k = ids.iter().position(|i| *i == f.component).unwrap_or(0);
+        let next = if forward { (k + 1).min(ids.len().saturating_sub(1)) } else { k.saturating_sub(1) };
+        let Some(id) = ids.get(next) else {
+            self.close_active_modal();
+            return;
+        };
+        let mut form = rename_form(db, f.set, id);
+        form.rename = f.rename;
+        follow_rename(&mut form);
+        self.sheet_set.selected = Some(id.clone());
+        self.sheet_set.dialog = Some(SsDialog::Form(form));
+    }
+
+    /// The View Category dialog for a new (`None`) or existing category.
+    fn open_category(&mut self, id: Option<String>) {
+        let (Some(set), Some(db)) = (self.sheet_set.current, self.sheet_set.db()) else { return };
+        let used = id.as_deref().map(|i| db.category_blocks(i));
+        let blocks = db
+            .callout_blocks()
+            .iter()
+            .map(|b| {
+                let label = format!("{} ({})", b.prop("Name").unwrap_or(""), db.resolve_file(b));
+                let on = used.as_ref().is_none_or(|u| u.iter().any(|x| x == b.id()));
+                (b.id().to_string(), label, on)
+            })
+            .collect();
+        let name = id.as_deref().and_then(|i| db.find(i)).and_then(|c| c.prop("Name")).unwrap_or("").to_string();
+        self.sheet_set.dialog = Some(SsDialog::Category(Category { set, id, name, blocks, removed: Vec::new(), error: None }));
+        self.active_modal = Some(crate::app::ModalKind::SheetSet);
+    }
+
+    fn category_ok(&mut self, mut c: Category) {
+        let name = c.name.trim().to_string();
+        if name.is_empty() {
+            c.error = Some(crate::t!("The category name cannot be empty.").into_owned());
+            self.sheet_set.dialog = Some(SsDialog::Category(c));
+            return;
+        }
+        self.close_active_modal();
+        let Some(db) = self.sheet_set.sets.get_mut(c.set) else { return };
+        // Blocks deleted in List of Blocks leave the set and every category.
+        if !c.removed.is_empty() {
+            let cats: Vec<(String, String, Vec<String>)> = db
+                .view_categories()
+                .iter()
+                .map(|k| (k.id().to_string(), k.prop("Name").unwrap_or("").to_string(), db.category_blocks(k.id())))
+                .collect();
+            for (id, name, blocks) in cats {
+                let kept: Vec<String> = blocks.into_iter().filter(|b| !c.removed.contains(b)).collect();
+                db.set_view_category(Some(&id), &name, &kept);
+            }
+            for id in &c.removed {
+                db.remove(id);
+            }
+        }
+        let mut used = Vec::new();
+        for (id, _, on) in &c.blocks {
+            let id = match id.strip_prefix("new:") {
+                Some(spec) => {
+                    let mut p = spec.splitn(3, '|');
+                    let (file, block, handle) = (p.next().unwrap_or(""), p.next().unwrap_or(""), p.next().unwrap_or(""));
+                    match db.add_callout_block(file, block, handle) {
+                        Some(id) => id,
+                        None => continue,
+                    }
+                }
+                None => id.clone(),
+            };
+            if *on {
+                used.push(id);
+            }
+        }
+        db.set_view_category(c.id.as_deref(), &name, &used);
+        self.sheet_set.current = Some(c.set);
+        self.save_current_sheet_set();
+    }
+
+    /// A drawing read and cached, or the task that reads it off the UI thread
+    /// and then handles `then` again.
+    fn drawing_or_read(
+        &mut self,
+        path: &str,
+        then: SheetSetMsg,
+    ) -> Result<std::sync::Arc<codec::CadDocument>, Task<Message>> {
+        if let Some(doc) = self.sheet_set.drawings.get(path) {
+            return Ok(doc);
+        }
+        let path = path.to_string();
+        Err(crate::app::update::background_task(
+            crate::t!("Sheet Set Manager"),
+            {
+                let path = path.clone();
+                move || crate::ui::window::sheet_set::read_drawing(&path)
+            },
+            move |read| Message::SheetSet(SheetSetMsg::DrawingRead(path, read, Box::new(then))),
+        ))
+    }
+
+    /// A block preview (`name` empty: the drawing's model space) of a cached
+    /// drawing, cached by `file|name`; returns its key.
+    fn block_preview(&mut self, file: &str, name: &str) -> Option<String> {
+        let key = format!("{}|{}", ss::path_key(file), name);
+        if self.sheet_set.previews.contains_key(&key) {
+            return Some(key);
+        }
+        // The cached drawing is lent to a scene for tessellation, not copied.
+        let (modified, doc) = self.sheet_set.drawings.take(file)?;
+        let mut scene = crate::scene::Scene::new();
+        scene.document = std::sync::Arc::try_unwrap(doc).unwrap_or_else(|doc| (*doc).clone());
+        let wires = if name.is_empty() {
+            let model = scene.document.header.model_space_block_handle;
+            let entities: Vec<codec::EntityType> = scene
+                .document
+                .entities()
+                .filter(|e| e.common().owner_handle == model)
+                .filter(|e| !matches!(e, codec::EntityType::Block(_) | codec::EntityType::BlockEnd(_)))
+                .take(20_000)
+                .cloned()
+                .collect();
+            scene.wires_for_entities(&entities)
+        } else {
+            scene.block_preview_wires(name)
+        };
+        let doc = std::mem::take(&mut scene.document);
+        self.sheet_set.drawings.insert(file, modified, std::sync::Arc::new(doc));
+        self.sheet_set.previews.insert(key.clone(), wires);
+        Some(key)
+    }
+
+    /// The file and block name behind a List of Blocks id.
+    fn listed_block(&self, set: usize, id: &str) -> Option<(String, String)> {
+        if let Some(spec) = id.strip_prefix("new:") {
+            let mut p = spec.splitn(3, '|');
+            return Some((p.next()?.to_string(), p.next()?.to_string()));
+        }
+        let db = self.sheet_set.sets.get(set)?;
+        let b = db.find(id)?;
+        Some((db.resolve_file(b), b.prop("Name").unwrap_or("").to_string()))
+    }
+
+    /// Named model views of a drawing (read once, when its row is opened);
+    /// `Err` reads the drawing first.
+    fn load_model_views(&mut self, path: &str) -> Result<(), Task<Message>> {
+        let key = ss::path_key(path);
+        if self.sheet_set.model_views.contains_key(&key) {
+            return Ok(());
+        }
+        let doc = self.drawing_or_read(path, SheetSetMsg::SeeViews(path.to_string()))?;
+        let views = doc.views.iter().filter(|v| !v.paper_space).map(|v| v.name.clone()).collect();
+        self.sheet_set.model_views.insert(key, views);
+        Ok(())
+    }
+
+    /// The current set's sheet shown by the active tab at its current layout.
+    fn current_sheet(&self) -> Option<(usize, String)> {
+        let set = self.sheet_set.current?;
+        let db = self.sheet_set.db()?;
+        let tab = &self.tabs[self.active_tab];
+        let path = tab.current_path.as_ref()?.to_string_lossy().to_string();
+        let layout = tab.scene.current_layout.clone();
+        let sheet = db.sheet_for(&path, Some(&layout))?;
+        sheet
+            .named("Layout")
+            .and_then(|r| r.prop("Name"))
+            .is_some_and(|n| n.eq_ignore_ascii_case(&layout))
+            .then(|| (set, sheet.id().to_string()))
+    }
+
+    /// Start the insertion point of Place on Sheet / a callout or label block.
+    fn start_placing(&mut self, placing: Placing, size: (f64, f64)) {
+        let i = self.active_tab;
+        let scales: Vec<(String, f64)> = if size.0 > 0.0 {
+            self.tabs[i]
+                .scene
+                .scale_list()
+                .into_iter()
+                .filter(|(_, _, factor)| *factor > 0.0)
+                .map(|(name, _, factor)| (name, factor))
+                .collect()
+        } else {
+            Vec::new()
+        };
+        self.sheet_set.placing = Some(placing);
+        let command = SheetSetPlaceCommand { size, scale: 1.0, scales };
+        self.command_line.push_info(&command.prompt());
+        self.tabs[i].active_cmd = Some(Box::new(command));
+    }
+
+    /// Place on Sheet: only on a sheet of this set open at its layout.
+    /// The model drawing and the set's view label block drawing are read
+    /// first.
+    fn start_place_view(&mut self, drawing: String, view: Option<String>) -> Task<Message> {
+        if self.tabs[self.active_tab].scene.current_layout.eq_ignore_ascii_case("Model") {
+            self.command_line.push_error(
+                crate::t!("Content cannot be placed into model space. Please switch to paper space and try again.")
+                    .as_ref(),
+            );
+            return Task::none();
+        }
+        let Some((set, sheet)) = self.current_sheet() else {
+            self.command_line
+                .push_error(crate::t!("Open a sheet of this sheet set at its layout to place a view on it.").as_ref());
+            return Task::none();
+        };
+        let again = || SheetSetMsg::PlaceOnSheet(drawing.clone(), view.clone());
+        let label = self.sheet_set.db().and_then(|db| db.sheet_set().named("DefLabelBlk").map(|b| db.resolve_file(b)));
+        if let Some(label) = label.filter(|l| Path::new(l).is_file()) {
+            if let Err(task) = self.drawing_or_read(&label, again()) {
+                return task;
+            }
+        }
+        let size = match self.drawing_or_read(&drawing, again()) {
+            Ok(doc) => model_view(&doc, view.as_deref()).map(|v| (v.width, v.height)),
+            Err(task) => return task,
+        };
+        let Some(size) = size else {
+            self.command_line.push_error(crate::tf!("{}: no view to place.", drawing).as_ref());
+            return Task::none();
+        };
+        self.start_placing(Placing::View { set, sheet, drawing, view }, size);
+        Task::none()
+    }
+
+    /// A sheet view's commands.
+    fn view_menu(&mut self, id: String, action: ViewAction) -> Task<Message> {
+        let Some(set) = self.sheet_set.current else { return Task::none() };
+        let Some(db) = self.sheet_set.db() else { return Task::none() };
+        let Some(sheet) = db.parent_of(&id).and_then(|v| db.parent_of(v.id())).map(|s| s.id().to_string()) else {
+            return Task::none();
+        };
+        let view_name = db.find(&id).and_then(|v| v.named("NamedView")).and_then(|r| r.prop("Name")).unwrap_or("").to_string();
+        match action {
+            ViewAction::Display => {
+                let open = db.layout_reference(&sheet, "Layout").map(|r| self.tab_showing(Path::new(&r.file_name)).is_some()).unwrap_or(false);
+                let task = self.open_sheet(&sheet);
+                if open {
+                    return task.chain(Task::done(Message::Command(format!("VIEW RESTORE {view_name}"))));
+                }
+                self.sheet_set.pending_view = Some(view_name);
+                return task;
+            }
+            ViewAction::Rename => {
+                self.sheet_set.dialog = Some(SsDialog::Form(view_form(db, set, &id)));
+                self.active_modal = Some(crate::app::ModalKind::SheetSet);
+            }
+            ViewAction::Category(category) => {
+                if let Some(db) = self.sheet_set.db_mut() {
+                    if let Some(v) = db.find_mut(&id) {
+                        let mut r = ss::object("AcSmObjectReference", ss::CLSID_OBJECT_REFERENCE, Some("Category"));
+                        r.set_prop_vt("ReferencedObject", -1, &category);
+                        v.put_named(r);
+                    }
+                }
+                self.save_current_sheet_set();
+            }
+            ViewAction::Callout(_) | ViewAction::Label if self.tabs[self.active_tab].scene.current_layout.eq_ignore_ascii_case("Model") => {
+                self.command_line
+                    .push_error(crate::t!("Content cannot be placed into model space. Please switch to paper space and try again.").as_ref());
+            }
+            ViewAction::Callout(_) | ViewAction::Label if self.current_sheet().map(|s| s.1) != Some(sheet.clone()) => {
+                self.command_line
+                    .push_error(crate::t!("Open the view's sheet at its layout to place a block on it.").as_ref());
+            }
+            ViewAction::Callout(_) | ViewAction::Label => {
+                let b = match &action {
+                    ViewAction::Callout(block) => db.find(block),
+                    _ => db.sheet_set().named("DefLabelBlk"),
+                };
+                let Some(b) = b else {
+                    if action == ViewAction::Label {
+                        self.command_line.push_error(crate::t!("The sheet set has no label block for views.").as_ref());
+                    }
+                    return Task::none();
+                };
+                let (file, name) = (db.resolve_file(b), b.prop("Name").unwrap_or("").to_string());
+                // The block's drawing is read first.
+                if let Err(task) = self.drawing_or_read(&file, SheetSetMsg::ViewMenu(id.clone(), action)) {
+                    return task;
+                }
+                self.start_placing(Placing::Block { set, sheet, view: id, file, name }, (0.0, 0.0));
+            }
+        }
+        Task::none()
+    }
+
+    /// Bring block `name` of drawing `file` into tab `i` (when missing) and
+    /// insert it at `at` with its attributes; their `?View.` / `?Sheet.`
+    /// fields become the view's and sheet's navigation fields.
+    fn insert_set_block(&mut self, i: usize, file: &str, name: &str, at: codec::types::Vector3, view: &str, sheet: &str, set: usize) {
+        let Some(source) = self.sheet_set.drawings.get(file) else {
+            self.command_line.push_error(crate::tf!("{}: cannot be read.", file).as_ref());
+            return;
+        };
+        let probe = codec::EntityType::Insert(codec::entities::Insert::new(name.to_string(), codec::types::Vector3::ZERO));
+        let deps = crate::app::ClipboardDeps::capture(&source, std::slice::from_ref(&probe));
+        self.merge_dependencies(i, &deps);
+        for def in deps.blocks {
+            let scene = &mut self.tabs[i].scene;
+            if scene.document.block_records.get(&def.name).is_none() {
+                scene.define_block_raw(&def.name, def.base_point, def.entities);
+            }
+        }
+        let units = source.block_records.get(name).map(|b| b.units).filter(|u| *u != 0).unwrap_or(source.header.insertion_units);
+        let host = self.tabs[i].scene.document.header.insertion_units;
+        let k = crate::app::properties::insert_unit_scale(host, units).unwrap_or(1.0);
+        let mut insert = codec::entities::Insert::new(name.to_string(), at).with_scale(k, k, k);
+        let transform = insert.get_transform();
+        let doc = &self.tabs[i].scene.document;
+        let attdefs: Vec<codec::entities::AttributeDefinition> = doc
+            .block_records
+            .get(name)
+            .map(|br| {
+                br.entity_handles
+                    .iter()
+                    .filter_map(|h| match doc.get_entity(*h) {
+                        Some(codec::EntityType::AttributeDefinition(d)) if !d.flags.constant => Some(d.clone()),
+                        _ => None,
+                    })
+                    .collect()
+            })
+            .unwrap_or_default();
+        for d in &attdefs {
+            let mut a = codec::entities::AttributeEntity::from_definition(d, None);
+            a.apply_transform(&transform);
+            insert.attributes.push(a);
+        }
+        let handle = self.tabs[i].scene.add_entity(codec::EntityType::Insert(insert));
+        let Some(db) = self.sheet_set.sets.get(set) else { return };
+        let (view_prefix, sheet_prefix) = (component_prefix(db, view), component_prefix(db, sheet));
+        crate::entities::field::attach_attribute_fields_mapped(&mut self.tabs[i].scene.document, handle, &|code: &str| {
+            code.replace("?View.", &view_prefix).replace("?Sheet.", &sheet_prefix)
+        });
+        self.tabs[i].scene.bump_entities(&[(handle, crate::scene::ChangeKind::Modified)]);
+    }
+
+    /// The insertion point was picked: place the view (xref, viewport, paper
+    /// named view, view label, sheet view record) or the block.
+    fn place_at(&mut self, i: usize, x: f64, y: f64, scale: f64) {
+        use codec::types::Vector3;
+        let Some(placing) = self.sheet_set.placing.take() else { return };
+        self.push_undo_snapshot(i, "Place on Sheet");
+        match placing {
+            Placing::Block { set, sheet, view, file, name } => {
+                self.insert_set_block(i, &file, &name, Vector3::new(x, y, 0.0), &view, &sheet, set);
+            }
+            Placing::View { set, sheet, drawing, view } => {
+                let Some(mv) = self.sheet_set.drawings.get(&drawing).and_then(|d| model_view(&d, view.as_deref())) else {
+                    return;
+                };
+                let title = view.clone().unwrap_or_else(|| {
+                    Path::new(&drawing).file_stem().map(|s| s.to_string_lossy().to_string()).unwrap_or_default()
+                });
+                // The model drawing is attached to the sheet's model space.
+                let host = self.tabs[i].current_path.clone();
+                let request = crate::modules::insert::xattach::XrefAttachRequest {
+                    path: drawing.clone(),
+                    overlay: false,
+                    path_type: crate::io::xref_model::Pathtype::Relative,
+                };
+                let scene = &mut self.tabs[i].scene;
+                let xref = crate::modules::insert::xattach::prepare_xref_definition(scene, &request, host.as_deref());
+                let model = scene.document.header.model_space_block_handle;
+                let inserted = scene.document.entities().any(|e| {
+                    e.common().owner_handle == model && matches!(e, codec::EntityType::Insert(ins) if ins.block_name.eq_ignore_ascii_case(&xref))
+                });
+                if !inserted {
+                    let saved = std::mem::replace(&mut scene.current_layout, "Model".to_string());
+                    scene.add_entity(codec::EntityType::Insert(codec::entities::Insert::new(xref, Vector3::ZERO)));
+                    scene.current_layout = saved;
+                }
+                // The viewport: lower-left corner at the point, the view at the scale.
+                let (w, h) = (mv.width * scale, mv.height * scale);
+                let mut vp = codec::entities::Viewport::new();
+                vp.center = Vector3::new(x + w / 2.0, y + h / 2.0, 0.0);
+                vp.width = w;
+                vp.height = h;
+                vp.id = scene.next_viewport_id();
+                vp.view_target = mv.target.clone();
+                vp.view_direction = mv.direction.clone();
+                // ponytail: plan views only (the DCS offset is the world XY
+                // offset); a twisted or 3D view needs the view basis here.
+                vp.view_center = Vector3::new(mv.center.x - mv.target.x, mv.center.y - mv.target.y, 0.0);
+                vp.view_height = mv.height;
+                vp.custom_scale = scale;
+                scene.add_entity(codec::EntityType::Viewport(vp));
+                // A paper-space named view of the same name frames it.
+                let mut named = codec::tables::View::new(title.as_str());
+                named.handle = scene.document.allocate_handle();
+                named.paper_space = true;
+                named.center = Vector3::new(x + w / 2.0, y + h / 2.0, 0.0);
+                named.width = w;
+                named.height = h;
+                named.direction = Vector3::new(0.0, 0.0, 1.0);
+                let view_handle = format!("{:X}", named.handle.value());
+                scene.document.views.add_or_replace(named);
+                let file = host.map(|p| ss::native_path(&p.to_string_lossy())).unwrap_or_default();
+                let Some(db) = self.sheet_set.sets.get_mut(set) else { return };
+                // The view joins the set's default (unnamed) category.
+                let category = db
+                    .sheet_set()
+                    .named("ViewCategories")
+                    .and_then(|c| c.children.iter().find(|k| k.name == "AcSmViewCategory" && k.prop("Name").is_none()))
+                    .map(|k| k.id().to_string());
+                let reference = LayoutReference { file_name: file, name: title.clone(), handle: view_handle };
+                let Some(view_id) = db.add_sheet_view(&sheet, category.as_deref(), &reference, &title) else { return };
+                let label = db.sheet_set().named("DefLabelBlk").map(|b| (db.resolve_file(b), b.prop("Name").unwrap_or("").to_string()));
+                // The set is written first, so the label's fields find the new view.
+                self.sheet_set.current = Some(set);
+                self.save_current_sheet_set();
+                if let Some((file, name)) = label {
+                    self.insert_set_block(i, &file, &name, Vector3::new(x, y, 0.0), &view_id, &sheet, set);
+                }
+            }
+        }
+        self.tabs[i].dirty = true;
+        self.refresh_xref_manager();
+    }
+
+    /// Select Block: read a drawing's named blocks.
+    fn select_block_file(&mut self, path: PathBuf) -> Task<Message> {
+        let file = path.to_string_lossy().to_string();
+        let doc = match self.drawing_or_read(&file, SheetSetMsg::SelectBlockPicked(Some(path))) {
+            Ok(doc) => doc,
+            Err(task) => return task,
+        };
+        let mut names: Vec<(String, String, bool)> = doc
+            .block_records
+            .iter()
+            .filter(|b| !b.name.starts_with('*') && !b.is_layout())
+            .map(|b| (b.name.clone(), format!("{:X}", b.handle.value()), false))
+            .collect();
+        names.sort();
+        drop(doc);
+        // The whole drawing is the first preview.
+        let preview = self.block_preview(&file, "");
+        if let Some(SsDialog::SelectBlock(b)) = self.sheet_set.dialog.as_mut() {
+            b.file = file;
+            b.names = names;
+            b.preview = preview;
+            b.error = None;
+        }
+        Task::none()
+    }
+
+    /// Model Views: each location folder of the current set and its drawings.
+    pub(in crate::app) fn refresh_locations(&mut self) {
+        let Some(db) = self.sheet_set.db() else {
+            self.sheet_set.locations.clear();
+            return;
+        };
+        self.sheet_set.locations = db
+            .sheet_set()
+            .named("Resources")
+            .map(|r| {
+                r.children
+                    .iter()
+                    .map(|c| {
+                        let folder = db.resolve_file(c);
+                        let mut files: Vec<String> = std::fs::read_dir(&folder)
+                            .map(|d| {
+                                d.filter_map(|e| e.ok())
+                                    .map(|e| e.file_name().to_string_lossy().to_string())
+                                    .filter(|n| n.to_ascii_lowercase().ends_with(".dwg"))
+                                    .collect()
+                            })
+                            .unwrap_or_default();
+                        files.sort_by_key(|n| n.to_lowercase());
+                        (c.id().to_string(), folder, files)
+                    })
+                    .collect()
+            })
+            .unwrap_or_default();
+    }
+
+    /// SSMSHEETSTATUS: a sheet whose drawing is missing, or open (its `.dwl`
+    /// lock file, or a tab of this application).
+    pub(in crate::app) fn refresh_sheet_status(&mut self) {
+        self.sheet_set.status_at = Some(iced::time::Instant::now());
+        self.sheet_set.status.clear();
+        if self.sheet_set.settings.sheet_status == 0 {
+            return;
+        }
+        let Some(db) = self.sheet_set.db() else { return };
+        let folder = db.path.as_deref().and_then(|p| Path::new(p).parent().map(Path::to_path_buf));
+        let mut status = std::collections::HashMap::new();
+        for sheet in db.sheets() {
+            let Some(r) = db.layout_reference(sheet.id(), "Layout") else { continue };
+            let path = Path::new(&r.file_name);
+            // The reference finds a sheet through its relative path: when that
+            // names no file the sheet is missing, even if the stored absolute
+            // path still exists.
+            let relative = sheet.named("Layout").and_then(|l| l.prop("Relative_FileName")).zip(folder.as_deref());
+            let found = match relative {
+                Some((rel, folder)) => folder.join(rel.replace('\\', std::path::MAIN_SEPARATOR_STR)).exists(),
+                None => path.exists(),
+            };
+            let state = if !found {
+                Some(SheetStatus::Missing)
+            } else if path.with_extension("dwl").exists() {
+                Some(SheetStatus::Locked)
+            } else {
+                None
+            };
+            if let Some(st) = state {
+                status.insert(sheet.id().to_string(), st);
+            }
+        }
+        self.sheet_set.status = status;
+    }
+
+    fn properties_template(&mut self, path: PathBuf) -> Task<Message> {
+        let file = path.to_string_lossy().to_string();
+        let layouts = match self.drawing_or_read(&file, SheetSetMsg::TemplatePicked(Some(path))) {
+            Ok(doc) => paper_layouts(&doc),
+            Err(task) => return task,
+        };
+        if let Some(SsDialog::Template(t)) = self.sheet_set.dialog.as_mut() {
+            t.file = file;
+            t.layouts = layouts.into_iter().map(|(n, _)| n).collect();
+            t.layout = 0;
+            return Task::none();
+        }
+        let Some(SsDialog::Properties(p)) = self.sheet_set.dialog.as_mut() else {
+            return Task::none();
+        };
+        match layouts.first() {
+            Some((name, _)) => {
+                if let Some(row) = p.rows.iter_mut().find(|r| r.key == RowKey::Template) {
+                    row.value = format!("{name} ({file})");
+                }
+                p.template = Some((file, name.clone()));
+                p.error = None;
+            }
+            None => p.error = Some(crate::t!("The drawing has no layout to use as a sheet template.").into_owned()),
+        }
+        Task::none()
+    }
+
+    fn sheet_set_dialog_ok(&mut self) -> Task<Message> {
+        match self.sheet_set.dialog.take() {
+            Some(SsDialog::Wizard(w)) => self.finish_wizard(w),
+            Some(SsDialog::Properties(p)) => {
+                self.apply_properties(p);
+                Task::none()
+            }
+            Some(SsDialog::Form(f)) => self.form_ok(f),
+            Some(SsDialog::Confirm(set, id, _)) => {
+                self.close_active_modal();
+                if let Some(db) = self.sheet_set.sets.get_mut(set) {
+                    db.remove(&id);
+                }
+                self.sheet_set.current = Some(set);
+                self.sheet_set.selected = None;
+                self.save_current_sheet_set();
+                Task::none()
+            }
+            Some(SsDialog::Template(t)) => {
+                let mut form = t.form;
+                if let Some(layout) = t.layouts.get(t.layout) {
+                    form.drawing = format!("{layout} ({})", t.file);
+                    form.template = Some((t.file, layout.clone()));
+                }
+                self.sheet_set.dialog = Some(SsDialog::Form(form));
+                Task::none()
+            }
+            Some(SsDialog::Category(c)) => {
+                self.category_ok(c);
+                Task::none()
+            }
+            // List of Blocks: the list goes back to the View Category dialog.
+            Some(SsDialog::BlockList(b)) => {
+                let mut c = *b.category;
+                for (id, _, _) in &c.blocks {
+                    if !id.starts_with("new:") && !b.blocks.iter().any(|(k, _)| k == id) {
+                        c.removed.push(id.clone());
+                    }
+                }
+                c.blocks = b
+                    .blocks
+                    .into_iter()
+                    .map(|(id, label)| {
+                        let on = c.blocks.iter().find(|(k, _, _)| *k == id).is_none_or(|(_, _, on)| *on);
+                        (id, label, on)
+                    })
+                    .collect();
+                self.sheet_set.dialog = Some(SsDialog::Category(c));
+                Task::none()
+            }
+            // Select Block: the whole drawing or its checked blocks join the list.
+            Some(SsDialog::SelectBlock(mut b)) => {
+                if b.file.is_empty() {
+                    b.error = Some(crate::t!("Enter the drawing file name.").into_owned());
+                    self.sheet_set.dialog = Some(SsDialog::SelectBlock(b));
+                    return Task::none();
+                }
+                let file = ss::native_path(&b.file);
+                let mut list = *b.list;
+                if b.whole {
+                    let stem = Path::new(&file).file_stem().map(|s| s.to_string_lossy().to_string()).unwrap_or_default();
+                    list.blocks.push((format!("new:{file}|{stem}|"), format!("{stem} ({file})")));
+                } else {
+                    for (name, handle, _) in b.names.into_iter().filter(|n| n.2) {
+                        list.blocks.push((format!("new:{file}|{name}|{handle}"), format!("{name} ({file})")));
+                    }
+                }
+                self.sheet_set.dialog = Some(SsDialog::BlockList(list));
+                Task::none()
+            }
+            None => Task::none(),
+        }
+    }
+
+    fn finish_wizard(&mut self, mut w: Wizard) -> Task<Message> {
+        sync_wizard_draft(&mut w);
+        let path = crate::ui::window::sheet_set::wizard_dst_path(&w);
+        if w.name.trim().is_empty() || !Path::new(&w.folder).is_dir() {
+            w.error = Some(crate::t!("The folder for the sheet set data file does not exist.").into_owned());
+            self.sheet_set.dialog = Some(SsDialog::Wizard(w));
+            return Task::none();
+        }
+        if Path::new(&path).exists() {
+            w.error = Some(crate::tf!("{} already exists.", path).into_owned());
+            self.sheet_set.dialog = Some(SsDialog::Wizard(w));
+            return Task::none();
+        }
+        let mut db = w.draft.clone();
+        db.path = Some(path.clone());
+        let set = db.sheet_set().id().to_string();
+        // Written again now the `.dst` has a place, so it carries its relative path.
+        let location = db
+            .file_reference(&set, "NewSheetLocation")
+            .filter(|f| !f.is_empty())
+            .unwrap_or_else(|| w.folder.clone());
+        db.set_file_reference(&set, "NewSheetLocation", &location);
+        // Existing drawings: a subset per folder, a sheet per chosen layout.
+        if w.existing {
+            for folder in &w.folders {
+                let chosen: Vec<&FoundLayout> = w.layouts.iter().filter(|l| l.on && &l.folder == folder).collect();
+                if chosen.is_empty() {
+                    continue;
+                }
+                let name = Path::new(folder).file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_default();
+                let Some(sub) = db.add_subset(&set, &name, "") else {
+                    continue;
+                };
+                if w.hierarchy {
+                    db.set_file_reference(&sub, "NewSheetLocation", folder);
+                }
+                for l in chosen {
+                    let stem = Path::new(&l.file).file_stem().map(|s| s.to_string_lossy().to_string()).unwrap_or_default();
+                    if let Some(sheet) = db.add_sheet(&sub, "", &format!("{stem} - {}", l.layout), "") {
+                        db.set_layout_reference(
+                            &sheet,
+                            "Layout",
+                            &LayoutReference { file_name: l.file.clone(), name: l.layout.clone(), handle: l.handle.clone() },
+                        );
+                    }
+                }
+            }
+        }
+        if let Err(e) = write_set(&mut db, &path) {
+            w.error = Some(e);
+            self.sheet_set.dialog = Some(SsDialog::Wizard(w));
+            return Task::none();
+        }
+        self.close_active_modal();
+        if let Err(e) = self.open_sheet_set(Path::new(&path), true) {
+            self.command_line.push_error(&e);
+        }
+        Task::none()
+    }
+
+    fn apply_properties(&mut self, mut p: Properties) {
+        // Back to the wizard: the draft takes the edits.
+        if let Some(mut w) = p.wizard.take() {
+            write_properties(&mut w.draft, &p);
+            let set = w.draft.sheet_set();
+            w.name = set.prop("Name").unwrap_or("").to_string();
+            w.description = set.prop("Desc").unwrap_or("").to_string();
+            self.sheet_set.dialog = Some(SsDialog::Wizard(*w));
+            return;
+        }
+        self.close_active_modal();
+        let Some(db) = p.set.and_then(|k| self.sheet_set.sets.get_mut(k)) else {
+            return;
+        };
+        write_properties(db, &p);
+        self.sheet_set.current = p.set;
+        self.save_current_sheet_set();
+    }
+
+    fn form_ok(&mut self, mut f: Form) -> Task<Message> {
+        let Some(db) = self.sheet_set.sets.get_mut(f.set) else {
+            self.close_active_modal();
+            return Task::none();
+        };
+        match f.kind {
+            FormKind::Rename => {
+                if let Err(e) = self.apply_rename(&f) {
+                    f.error = Some(e);
+                    self.sheet_set.dialog = Some(SsDialog::Form(f));
+                    return Task::none();
+                }
+            }
+            FormKind::NewSubset => {
+                let name = f.title.trim().to_string();
+                if name.is_empty() {
+                    f.error = Some(crate::t!("The subset name cannot be empty.").into_owned());
+                    self.sheet_set.dialog = Some(SsDialog::Form(f));
+                    return Task::none();
+                }
+                let parent_folder = sheet_folder_of(db, &f.component);
+                if let Some(sub) = db.add_subset(&f.component, &name, "New subset added") {
+                    // Folder hierarchy: the parent's location + the subset name, created now.
+                    let folder = if f.hierarchy {
+                        let folder = Path::new(&parent_folder).join(&name);
+                        let _ = std::fs::create_dir_all(&folder);
+                        folder.to_string_lossy().to_string()
+                    } else {
+                        f.folder.trim().to_string()
+                    };
+                    if !folder.is_empty() {
+                        db.set_file_reference(&sub, "NewSheetLocation", &folder);
+                    }
+                    if !f.publish {
+                        if let Some(el) = db.find_mut(&sub) {
+                            el.set_prop_vt("OverrideSheetPublish", 2, "-1");
+                        }
+                    }
+                }
+            }
+            FormKind::ImportLayout => {
+                let chosen: Vec<&ImportRow> = f.rows.iter().filter(|r| r.on && !r.taken).collect();
+                if chosen.is_empty() {
+                    f.error = Some(crate::t!("The drawing has no layout to import.").into_owned());
+                    self.sheet_set.dialog = Some(SsDialog::Form(f));
+                    return Task::none();
+                }
+                for r in chosen {
+                    let stem = Path::new(&r.drawing).file_stem().map(|s| s.to_string_lossy().to_string()).unwrap_or_default();
+                    let title = if f.prefix { format!("{stem} - {}", r.layout) } else { r.layout.clone() };
+                    if let Some(sheet) = db.add_sheet(&f.component, "", &title, "") {
+                        db.set_layout_reference(
+                            &sheet,
+                            "Layout",
+                            &LayoutReference { file_name: r.drawing.clone(), name: r.layout.clone(), handle: r.handle.clone() },
+                        );
+                    }
+                }
+            }
+            FormKind::NewSheet => return self.create_sheet(f),
+            FormKind::RenameView => {
+                if let Some(el) = db.find_mut(&f.component) {
+                    if f.number.trim().is_empty() {
+                        el.remove_named("Number");
+                    } else {
+                        el.set_prop("Number", f.number.trim());
+                    }
+                    el.set_prop("Title", f.title.trim());
+                }
+            }
+        }
+        self.close_active_modal();
+        self.sheet_set.current = Some(f.set);
+        self.save_current_sheet_set();
+        Task::none()
+    }
+
+    /// New Sheet: a drawing in the sheet folder holding one layout, named
+    /// "Number Title", from the sheet creation template (a new drawing's
+    /// Layout1 when the set names none); then the sheet and its layout
+    /// reference, and the drawing opens at it.
+    fn create_sheet(&mut self, mut f: Form) -> Task<Message> {
+        let fail = |app: &mut Self, mut f: Form, e: String| {
+            f.error = Some(e);
+            app.sheet_set.dialog = Some(SsDialog::Form(f));
+            Task::none()
+        };
+        let title = f.title.trim().to_string();
+        if title.is_empty() {
+            return fail(self, f, crate::t!("The sheet title cannot be empty.").into_owned());
+        }
+        let stem = if f.file_name.trim().is_empty() {
+            format!("{} {}", f.number.trim(), title).trim().to_string()
+        } else {
+            f.file_name.trim().trim_end_matches(".dwg").to_string()
+        };
+        let folder = PathBuf::from(f.folder.trim());
+        if std::fs::create_dir_all(&folder).is_err() {
+            return fail(self, f, crate::t!("The sheet folder cannot be created.").into_owned());
+        }
+        let path = folder.join(format!("{stem}.dwg"));
+        if path.exists() {
+            return fail(self, f, crate::tf!("{} already exists.", path.display()).into_owned());
+        }
+        let layout_name = format!("{} {}", f.number.trim(), title).trim().to_string();
+        let template = match f.template.clone() {
+            Some((file_name, name)) => Some(LayoutReference { file_name, name, handle: String::new() }),
+            None => self.sheet_set.sets.get(f.set).and_then(|db| template_of(db, &f.component)),
+        };
+        let mut scene = crate::scene::Scene::new();
+        let source_layout = match template.as_ref().and_then(|t| crate::io::load_file(Path::new(&t.file_name)).ok().map(|d| (d, t.name.clone()))) {
+            Some((doc, name)) => {
+                scene.document = doc;
+                name
+            }
+            None => {
+                scene.populate_new_drawing_defaults();
+                paper_layouts(&scene.document).into_iter().next().map(|(n, _)| n).unwrap_or_else(|| "Layout1".into())
+            }
+        };
+        for (name, _) in paper_layouts(&scene.document) {
+            if !name.eq_ignore_ascii_case(&source_layout) {
+                scene.delete_layout(&name);
+            }
+        }
+        scene.rename_layout(&source_layout, &layout_name);
+        let handle = paper_layouts(&scene.document)
+            .into_iter()
+            .find(|(n, _)| *n == layout_name)
+            .map(|(_, h)| h)
+            .unwrap_or_default();
+        f.number = f.number.trim().to_string();
+        let Some(db) = self.sheet_set.sets.get(f.set) else {
+            return Task::none();
+        };
+        // The drawing is saved first: a failed save leaves no sheet in the set.
+        // It records the revision the set's next write counts up to.
+        let dst = db.path.clone().unwrap_or_default();
+        let file = ss::native_path(&path.to_string_lossy());
+        scene.document.set_sheet_set_data(&SheetSetData {
+            layout_handle: handle.to_lowercase(),
+            layout_name: layout_name.clone(),
+            sheet_dwg_name: file.clone(),
+            sheet_set_file_name: ss::native_path(&dst),
+            sheet_set_version: db.file_revision() + 1,
+            update_count: 1,
+            update_time: utc_stamp(),
+        });
+        crate::entities::field::stamp_save_dates(&mut scene.document);
+        if let Err(e) = crate::io::save(&scene.document, &path) {
+            return fail(self, f, format!("{file}: {e}"));
+        }
+        let Some(db) = self.sheet_set.sets.get_mut(f.set) else {
+            return Task::none();
+        };
+        let Some(sheet) = db.add_sheet(&f.component, &f.number, &title, "") else {
+            return Task::none();
+        };
+        db.set_layout_reference(
+            &sheet,
+            "Layout",
+            &LayoutReference { file_name: file, name: layout_name, handle },
+        );
+        if let Err(e) = write_set(db, &dst) {
+            self.command_line.push_error(&format!("{dst}: {e}"));
+        }
+        // "Open in drawing editor" (off by default) opens the new sheet.
+        self.close_active_modal();
+        self.sheet_set.current = Some(f.set);
+        self.sheet_set.selected = Some(sheet.clone());
+        self.sheet_sets_changed();
+        if f.open_after {
+            return self.open_sheet(&sheet);
+        }
+        Task::none()
+    }
+}
+
+/// The default folder for new sheet set data: the user's Documents folder,
+/// else the home folder.
+fn dirs_next_documents() -> String {
+    let home = std::env::var("USERPROFILE").or_else(|_| std::env::var("HOME")).unwrap_or_default();
+    let documents = Path::new(&home).join("Documents");
+    if documents.is_dir() {
+        return documents.to_string_lossy().to_string();
+    }
+    home
+}
+
+/// Copy the wizard's name and description into its draft set.
+fn sync_wizard_draft(w: &mut Wizard) {
+    let set = w.draft.sheet_set_mut();
+    set.set_prop("Name", w.name.trim());
+    set.set_prop("Desc", &w.description);
+}
+
+/// The Properties rows for component `id` of `db` (`set` = its index among
+/// the open sets; `None` for the wizard's draft).
+pub(in crate::app) fn build_properties(db: &SheetSetDatabase, id: &str, set: Option<usize>) -> Properties {
+    let el = db.find(id).cloned().unwrap_or_default();
+    let kind = ComponentKind::of(&el).unwrap_or(ComponentKind::SheetSet);
+    let prop = |name: &str| el.prop(name).unwrap_or("").to_string();
+    let row = |group: &'static str, label: &'static str, key: RowKey, value: String| PropRow { group, label, key, value };
+    let template = || {
+        db.layout_reference(id, "DefDwtLayout")
+            .map(|t| format!("{} ({})", t.name, t.file_name))
+            .unwrap_or_default()
+    };
+    let prompt = || if el.prop("PromptForDwt").is_some_and(|v| v.trim() != "0") { "Yes" } else { "No" }.to_string();
+    let named_file = |name: &str| el.named(name).map(|r| db.resolve_file(r)).unwrap_or_default();
+    let mut rows = Vec::new();
+    let title;
+    match kind {
+        ComponentKind::SheetSet => {
+            title = format!("{} - {}", crate::t!("Sheet Set Properties"), prop("Name"));
+            rows.push(row("Sheet Set", "Name", RowKey::Prop("Name"), prop("Name")));
+            rows.push(row("Sheet Set", "Sheet set data file", RowKey::ReadOnly, db.path.clone().unwrap_or_default()));
+            rows.push(row("Sheet Set", "Description", RowKey::Prop("Desc"), prop("Desc")));
+            let resources = el
+                .named("Resources")
+                .map(|r| r.children.iter().map(|c| db.resolve_file(c)).collect::<Vec<_>>().join("; "))
+                .unwrap_or_default();
+            rows.push(row("Sheet Set", "Model view", RowKey::ReadOnly, resources));
+            let label_block = el
+                .named("DefLabelBlk")
+                .map(|r| format!("{} ({})", r.prop("Name").unwrap_or(""), db.resolve_file(r)))
+                .unwrap_or_default();
+            rows.push(row("Sheet Set", "Label block for views", RowKey::ReadOnly, label_block));
+            let callouts = el
+                .named("CalloutBlocks")
+                .map(|r| r.children.iter().filter_map(|c| c.prop("Name")).collect::<Vec<_>>().join("; "))
+                .unwrap_or_default();
+            rows.push(row("Sheet Set", "Callout blocks", RowKey::ReadOnly, callouts));
+            rows.push(row("Sheet Set", "Page setup overrides file", RowKey::ReadOnly, named_file("AltPageSetups")));
+            for (label, name) in [
+                ("Project number", "ProjectNumber"),
+                ("Project name", "ProjectName"),
+                ("Project phase", "ProjectPhase"),
+                ("Project milestone", "ProjectMilestone"),
+            ] {
+                rows.push(row("Project Control", label, RowKey::Prop(name), prop(name)));
+            }
+            rows.push(row("Sheet Creation", "Sheet storage location", RowKey::Folder("NewSheetLocation"), named_file("NewSheetLocation")));
+            rows.push(row("Sheet Creation", "Sheet creation template", RowKey::Template, template()));
+            rows.push(row("Sheet Creation", "Prompt for template", RowKey::PromptTemplate, prompt()));
+        }
+        ComponentKind::Subset => {
+            title = format!("{} - {}", crate::t!("Subset Properties"), prop("Name"));
+            rows.push(row("Subset", "Subset name", RowKey::Prop("Name"), prop("Name")));
+            let publish = if el.prop("OverrideSheetPublish").is_some_and(|v| v.trim() == "-1") {
+                "Do Not Publish Sheets"
+            } else {
+                "Publish by Sheet 'Include for Publish' Setting"
+            };
+            rows.push(row("Subset", "Publish sheets in subset", RowKey::Publish, publish.to_string()));
+            rows.push(row("Subset", "New sheet location", RowKey::Folder("NewSheetLocation"), named_file("NewSheetLocation")));
+            rows.push(row("Subset", "Sheet creation template", RowKey::Template, template()));
+            rows.push(row("Subset", "Prompt for template", RowKey::PromptTemplate, prompt()));
+        }
+        ComponentKind::Sheet => {
+            title = format!("{} - {}", crate::t!("Sheet Properties"), ss::number_and_title(&el));
+            for (label, name) in [
+                ("Title", "Title"),
+                ("Number", "Number"),
+                ("Description", "Desc"),
+                ("Revision number", "RevisionNumber"),
+                ("Revision date", "RevisionDate"),
+                ("Issue purpose", "IssuePurpose"),
+                ("Category", "Category"),
+            ] {
+                rows.push(row("Sheet", label, RowKey::Prop(name), prop(name)));
+            }
+            let layout = db.layout_reference(id, "Layout").unwrap_or_default();
+            rows.push(row("Sheet", "Layout name", RowKey::ReadOnly, layout.name));
+            rows.push(row("Sheet", "Drawing file", RowKey::ReadOnly, layout.file_name));
+        }
+    }
+    // A sheet shows the set's sheet properties, with its own value when set.
+    let custom = match kind {
+        ComponentKind::Sheet => {
+            let own = ss::custom_properties(&el);
+            ss::custom_properties(db.sheet_set())
+                .into_iter()
+                .filter(|(_, _, f)| f & ss::CUSTOM_SHEET_PROP != 0)
+                .map(|(n, v, f)| {
+                    let value = own.iter().find(|(o, _, _)| *o == n).map(|(_, v, _)| v.clone()).unwrap_or(v);
+                    (n, value, f)
+                })
+                .collect()
+        }
+        ComponentKind::SheetSet => ss::custom_properties(&el),
+        ComponentKind::Subset => Vec::new(),
+    };
+    Properties {
+        set,
+        component: id.to_string(),
+        kind,
+        title,
+        rows,
+        custom,
+        adding: None,
+        template: None,
+        wizard: None,
+        error: None,
+    }
+}
+
+/// Write a Properties dialog back into its component.
+fn write_properties(db: &mut SheetSetDatabase, p: &Properties) {
+    for r in &p.rows {
+        match &r.key {
+            RowKey::Prop(name) => {
+                if let Some(el) = db.find_mut(&p.component) {
+                    el.set_prop(name, &r.value);
+                }
+            }
+            RowKey::Folder(name) => {
+                db.set_file_reference(&p.component, name, r.value.trim());
+            }
+            RowKey::PromptTemplate => {
+                // The set keeps it as an int (1), a subset as a short (-1).
+                if let Some(el) = db.find_mut(&p.component) {
+                    el.remove_named("PromptForDwt");
+                    match (r.value == "Yes", p.kind) {
+                        (true, ComponentKind::SheetSet) => el.set_prop_vt("PromptForDwt", 3, "1"),
+                        (true, _) => el.set_prop_vt("PromptForDwt", 2, "-1"),
+                        _ => {}
+                    }
+                }
+            }
+            RowKey::Publish => {
+                if let Some(el) = db.find_mut(&p.component) {
+                    if r.value == "Do Not Publish Sheets" {
+                        el.set_prop_vt("OverrideSheetPublish", 2, "-1");
+                    } else {
+                        el.remove_named("OverrideSheetPublish");
+                    }
+                }
+            }
+            RowKey::Template | RowKey::ReadOnly => {}
+        }
+    }
+    if let Some((file, name)) = &p.template {
+        db.set_layout_reference(
+            &p.component,
+            "DefDwtLayout",
+            &LayoutReference { file_name: file.clone(), name: name.clone(), handle: String::new() },
+        );
+    }
+    match p.kind {
+        ComponentKind::SheetSet => {
+            if let Some(el) = db.find_mut(&p.component) {
+                let old: Vec<String> = ss::custom_properties(el).into_iter().map(|(n, _, _)| n).collect();
+                for n in old.iter().filter(|n| !p.custom.iter().any(|(c, _, _)| c == *n)) {
+                    ss::remove_custom_property(el, n);
+                }
+                for (n, v, f) in &p.custom {
+                    ss::set_custom_property(el, n, v, *f);
+                }
+            }
+        }
+        ComponentKind::Sheet => {
+            if let Some(el) = db.find_mut(&p.component) {
+                for (n, v, f) in &p.custom {
+                    ss::set_custom_property(el, n, v, *f);
+                }
+            }
+        }
+        ComponentKind::Subset => {}
+    }
+}
+
+/// Store fresh values for a drawing's sheet set fields (the fields keep them,
+/// as when the reference updates them) and redraw the hosts that changed;
+/// whether any did.
+fn refresh_sheet_fields(scene: &mut crate::scene::Scene) -> bool {
+    let changes: Vec<_> = crate::entities::field::refresh_sheet_set_fields(&mut scene.document)
+        .into_iter()
+        .map(|h| (h, crate::scene::ChangeKind::Modified))
+        .collect();
+    if !changes.is_empty() {
+        scene.bump_entities(&changes);
+    }
+    !changes.is_empty()
+}
diff --git a/src/app/control/actions.rs b/src/app/control/actions.rs
index 974939311..7b83731e8 100644
--- a/src/app/control/actions.rs
+++ b/src/app/control/actions.rs
@@ -83,6 +83,7 @@ pub(super) const NAMES: &[&str] = &[
     "dialog_ok",
     "attdef_dialog",
     "field_dialog",
+    "sheet_set",
     "close_document",
     "toggle_properties",
     "toggle_layers",
@@ -1208,6 +1209,24 @@ impl OpenCADStudio {
                     "plot_scale" => F::PlotScale(index(codec::fields::PLOT_SCALE_FORMATS.len())?),
                     "count" => F::CountExpression(v.into()),
                     "show_instances" => F::ShowCountInstances,
+                    "ss_custom" => F::SsCustom(v.into()),
+                    "ss_set" => F::SsSet(v.parse().map_err(|_| failure("invalid_value", "index"))?),
+                    "ss_dst" => F::SsPicked(Some(std::path::PathBuf::from(v))),
+                    "ss_node" => {
+                        let state = self.field_dialog.as_ref().ok_or_else(|| failure("invalid_state", "No Field dialog"))?;
+                        let db = state.ss_sets.get(state.ss_set).ok_or_else(|| failure("invalid_state", "No sheet set"))?;
+                        let views = state.name == "SheetView";
+                        let id = fd::nav_nodes(db, views)
+                            .into_iter()
+                            .find(|(_, id, label, _)| label == v || id == v)
+                            .map(|(_, id, _, _)| id)
+                            .ok_or_else(|| failure("invalid_value", "No such node"))?;
+                        F::SsNode(id)
+                    }
+                    "ss_prop" => F::SsProp(v.into()),
+                    "ss_href" => F::SsHref(v == "1"),
+                    "ss_placeholder" => F::SsPlaceholder(index(fd::PLACEHOLDER_TYPES.len())?),
+                    "ss_scale" => F::SsScaleFormat(index(codec::fields::PLOT_SCALE_FORMATS.len())?),
                     "placeholder" => F::PlaceholderProperty(index(codec::fields::BLOCK_PLACEHOLDER_PROPERTIES.len())?),
                     "table_function" => F::TableFunction(
                         ["Average", "Sum", "Count", "Cell"]
@@ -1218,6 +1237,203 @@ impl OpenCADStudio {
                     _ => return Err(failure("invalid_value", "Unknown field dialog key")),
                 })
             }
+            // Sheet Set Manager and its dialogs: "open=<dst>", "tab=list|views|model",
+            // "select=<target>", "activate=<target>", "menu=<action>:<target>"
+            // (open, new_sheet, new_subset, import, rename, remove, properties,
+            // close; a target is a sheet number or title, a subset name or
+            // "set"), "import_file=<dwg>", "new" (wizard), "existing=0|1",
+            // "step=<n>", "name=", "description=", "folder=", "hierarchy=0|1",
+            // "add_folder=<dir>", "layout=<i>:0|1", "wizard_props",
+            // "row=<i>:<value>", "prompt=0|1:<row>", "template=<file>",
+            // "custom=<i>:<value>", "add_custom", "custom_name=", "custom_default=",
+            // "custom_owner=0|1", "add_custom_ok", "number=", "title=",
+            // "file_name=", "pick_layout=<i>", "ok", "cancel".
+            "sheet_set" => {
+                use crate::ui::window::sheet_set::{FieldId as F, MenuAction as A, SheetSetMsg as M, SsmTab, WizardMsg as W};
+                let value = string(req, "value")?;
+                let (key, arg) = value.split_once('=').unwrap_or((value, ""));
+                let target = |app: &Self, spec: &str| {
+                    app.sheet_set_target(spec).ok_or_else(|| failure("invalid_value", "No such sheet set component"))
+                };
+                let index_value = |spec: &str| -> Result<(usize, String), Value> {
+                    let (i, v) = spec.split_once(':').unwrap_or((spec, ""));
+                    Ok((i.parse().map_err(|_| failure("invalid_value", "Expected <index>:<value>"))?, v.to_string()))
+                };
+                Message::SheetSet(match key {
+                    "open" => M::OpenPicked(Some(std::path::PathBuf::from(arg))),
+                    "import_file" => M::ImportPicked(Some(std::path::PathBuf::from(arg))),
+                    "tab" => M::Tab(match arg {
+                        "views" => SsmTab::SheetViews,
+                        "model" => SsmTab::ModelViews,
+                        _ => SsmTab::SheetList,
+                    }),
+                    "select" => M::Select(target(self, arg)?),
+                    "activate" => M::Activate(target(self, arg)?),
+                    "menu" => {
+                        let (action, spec) = arg.split_once(':').unwrap_or((arg, "set"));
+                        let action = match action {
+                            "open" => A::Open,
+                            "new_sheet" => A::NewSheet,
+                            "new_subset" => A::NewSubset,
+                            "import" => A::ImportLayout,
+                            "rename" => A::Rename,
+                            "remove" => A::Remove,
+                            "properties" => A::Properties,
+                            "close" => A::Close,
+                            _ => return Err(failure("invalid_value", "Unknown sheet set menu action")),
+                        };
+                        if action == A::ImportLayout {
+                            self.sheet_set_import_parent = Some(target(self, spec)?);
+                            return Ok(Task::none());
+                        }
+                        M::Menu(target(self, spec)?, action)
+                    }
+                    "new" => return Ok(self.dispatch_command("NEWSHEETSET")),
+                    "existing" => M::Wizard(W::Existing(arg == "1")),
+                    "step" => M::Wizard(W::Step(arg.parse().map_err(|_| failure("invalid_value", "step"))?)),
+                    "layout" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Wizard(W::LayoutOn(i, v == "1"))
+                    }
+                    "name" => M::Input(F::Name, arg.into()),
+                    "description" => M::Input(F::Description, arg.into()),
+                    "folder" => M::Input(F::Folder, arg.into()),
+                    "hierarchy" => M::Toggle(F::Hierarchy, arg == "1"),
+                    "add_folder" => M::FolderPicked(F::AddFolder, Some(std::path::PathBuf::from(arg))),
+                    "wizard_props" => M::WizardProperties,
+                    "row" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Input(F::Row(i), v)
+                    }
+                    "prompt" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Choose(F::Row(i), usize::from(v != "1"))
+                    }
+                    "template" => M::TemplatePicked(Some(std::path::PathBuf::from(arg))),
+                    "custom" => {
+                        let (i, v) = index_value(arg)?;
+                        M::CustomValue(i, v)
+                    }
+                    "add_custom" => M::AddCustom,
+                    "custom_name" => M::Input(F::CustomName, arg.into()),
+                    "custom_default" => M::Input(F::CustomDefault, arg.into()),
+                    "custom_owner" => M::Choose(F::CustomOwner, usize::from(arg == "1")),
+                    "add_custom_ok" => M::AddCustomOk,
+                    "number" => M::Input(F::Number, arg.into()),
+                    "title" => M::Input(F::Title, arg.into()),
+                    "file_name" => M::Input(F::FileName, arg.into()),
+                    "pick_layout" => M::Choose(F::Layout, arg.parse().map_err(|_| failure("invalid_value", "index"))?),
+                    "refresh" => M::Refresh,
+                    "open_after" => M::Toggle(F::OpenAfter, arg == "1"),
+                    "row_toggle" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Toggle(F::Row(i), v == "1")
+                    }
+                    "publish" => M::Toggle(F::Publish, arg == "1"),
+                    "layout_name" => M::Input(F::LayoutName, arg.into()),
+                    "rename_opt" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Toggle(F::RenameOption(i.min(3)), v == "1")
+                    }
+                    "import_add" => M::ImportAdd(arg.split('|').map(std::path::PathBuf::from).collect()),
+                    "import_row" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Toggle(F::ImportRow(i), v == "1")
+                    }
+                    "prefix" => M::Toggle(F::ImportPrefix, arg == "1"),
+                    "previous" => M::Previous,
+                    "next" => M::Next,
+                    "views_by_category" => M::ViewsByCategory(arg == "1"),
+                    "new_category" => M::NewCategory,
+                    "category" => {
+                        let id = self
+                            .sheet_set
+                            .db()
+                            .and_then(|db| db.view_categories().iter().find(|c| c.prop("Name") == Some(arg)).map(|c| c.id().to_string()))
+                            .ok_or_else(|| failure("invalid_value", "No such view category"))?;
+                        M::CategoryProperties(id)
+                    }
+                    "remove_category" => {
+                        let id = self
+                            .sheet_set
+                            .db()
+                            .and_then(|db| db.view_categories().iter().find(|c| c.prop("Name") == Some(arg)).map(|c| c.id().to_string()))
+                            .ok_or_else(|| failure("invalid_value", "No such view category"))?;
+                        M::CategoryRemove(id)
+                    }
+                    "category_block" => {
+                        let (i, v) = index_value(arg)?;
+                        M::Toggle(F::CategoryBlock(i), v == "1")
+                    }
+                    "add_location" => M::LocationPicked(Some(std::path::PathBuf::from(arg))),
+                    "remove_location" => {
+                        let id = self
+                            .sheet_set
+                            .locations
+                            .iter()
+                            .find(|(_, folder, _)| codec::sheet_set::path_key(folder) == codec::sheet_set::path_key(arg))
+                            .map(|(id, _, _)| id.clone())
+                            .ok_or_else(|| failure("invalid_value", "No such location"))?;
+                        M::RemoveLocation(id)
+                    }
+                    "open_drawing" => M::OpenDrawing(arg.into()),
+                    "toggle_drawing" => M::ToggleDrawing(arg.into()),
+                    "see_views" => M::SeeViews(arg.into()),
+                    // place=<drawing>[|<view>]
+                    "place" => {
+                        let (drawing, view) = arg.split_once('|').map_or((arg, None), |(d, v)| (d, Some(v.to_string())));
+                        M::PlaceOnSheet(drawing.into(), view)
+                    }
+                    // view=<view title or number - title>:<display|rename|label|category=<name>|callout=<block>>
+                    "view" => {
+                        use crate::ui::window::sheet_set::ViewAction as VA;
+                        let (spec, action) = arg.rsplit_once(':').ok_or_else(|| failure("invalid_value", "view=<view>:<action>"))?;
+                        let db = self.sheet_set.db().ok_or_else(|| failure("invalid_state", "No sheet set"))?;
+                        let view = db
+                            .sheets()
+                            .into_iter()
+                            .flat_map(|s| db.sheet_views(s))
+                            .find(|v| codec::sheet_set::number_and_title(v) == spec || v.prop("Title") == Some(spec))
+                            .map(|v| v.id().to_string())
+                            .ok_or_else(|| failure("invalid_value", "No such sheet view"))?;
+                        let (verb, name) = action.split_once('=').unwrap_or((action, ""));
+                        let a = match verb {
+                            "display" => VA::Display,
+                            "rename" => VA::Rename,
+                            "label" => VA::Label,
+                            "category" => VA::Category(
+                                db.view_categories()
+                                    .iter()
+                                    .find(|c| c.prop("Name") == Some(name))
+                                    .map(|c| c.id().to_string())
+                                    .ok_or_else(|| failure("invalid_value", "No such view category"))?,
+                            ),
+                            "callout" => VA::Callout(
+                                db.callout_blocks()
+                                    .iter()
+                                    .find(|b| b.prop("Name") == Some(name))
+                                    .map(|b| b.id().to_string())
+                                    .ok_or_else(|| failure("invalid_value", "No such callout block"))?,
+                            ),
+                            _ => return Err(failure("invalid_value", "display|rename|label|category=|callout=")),
+                        };
+                        M::ViewMenu(view, a)
+                    }
+                    "add_blocks" => M::AddBlocks,
+                    "block_list_select" => M::BlockListSelect(arg.parse().map_err(|_| failure("invalid_value", "index"))?),
+                    "block_list_add" => M::BlockListAdd,
+                    "block_list_delete" => M::BlockListDelete,
+                    "select_block_file" => M::SelectBlockPicked(Some(std::path::PathBuf::from(arg))),
+                    "select_block_whole" => M::SelectBlockWhole(arg == "1"),
+                    "select_block_check" => {
+                        let (i, v) = index_value(arg)?;
+                        M::SelectBlockCheck(i, v == "1")
+                    }
+                    "ok" => M::Ok,
+                    "cancel" => M::Cancel,
+                    _ => return Err(failure("invalid_value", "Unknown sheet set action")),
+                })
+            }
             "ribbon_dropdown" => Message::ToggleRibbonDropdown(string(req, "value")?.into()),
             "pdf_dialog_ok" => {
                 use crate::ui::window::pdf_dialogs::PdfDialogMsg;
@@ -1244,6 +1460,9 @@ impl OpenCADStudio {
                 Some(crate::app::ModalKind::AttDefEdit) => Message::AttdefDialog(
                     crate::ui::window::attdef_dialog::AttdefDialogMsg::EditOk,
                 ),
+                Some(crate::app::ModalKind::SheetSet) => Message::SheetSet(
+                    crate::ui::window::sheet_set::SheetSetMsg::Ok,
+                ),
                 Some(crate::app::ModalKind::Field) => Message::FieldDialog(
                     crate::ui::window::field_dialog::FieldDialogMsg::Ok,
                 ),
diff --git a/src/app/mod.rs b/src/app/mod.rs
index 0257df35a..b66878604 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -819,6 +819,13 @@ pub(super) struct OpenCADStudio {
     /// Point Cloud Manager palette (POINTCLOUDMANAGER).
     pub(crate) pc_manager: crate::ui::window::pc_manager::PcManager,
     pub(crate) count_palette: crate::ui::window::count_palette::CountPalette,
+    /// Sheet Set Manager palette, the open sheet sets and their dialogs.
+    pub(crate) sheet_set: crate::ui::window::sheet_set::SheetSetManager,
+    /// A sheet opened from the manager: its drawing (path key) and layout,
+    /// switched to once the drawing has loaded.
+    pub(crate) sheet_set_pending_layout: Option<(String, String)>,
+    /// The subset / set Import Layout as Sheet adds to, while its file picker is open.
+    pub(crate) sheet_set_import_parent: Option<String>,
     /// Which viewport background the colour wheel is editing, or `None` when
     /// it is closed. One slot, because only one wheel can be open at a time.
     pub(crate) bg_picker: Option<BgTarget>,
@@ -1992,6 +1999,8 @@ pub enum ModalKind {
     GpuWarning,
     /// Reference Manager help window (toolbar Help button).
     XrefHelp,
+    /// Sheet set wizard, properties and sheet / subset forms.
+    SheetSet,
 }
 
 /// A property group controlled by a layer state's restore mask.
@@ -3902,6 +3911,7 @@ pub enum Message {
     /// A click or search in the Point Cloud Manager.
     PcManager(crate::ui::window::pc_manager::PcManagerMsg),
     Count(crate::ui::window::count_palette::CountMsg),
+    SheetSet(crate::ui::window::sheet_set::SheetSetMsg),
     PdfImportPickResult(Result<(std::path::PathBuf, std::sync::Arc<Vec<u8>>), String>),
     /// Result of the PDFATTACH file picker.
     PdfAttachPickResult(Result<(std::path::PathBuf, std::sync::Arc<Vec<u8>>), String>),
@@ -4229,6 +4239,9 @@ impl OpenCADStudio {
             show_browser: false,
             pc_manager: Default::default(),
             count_palette: Default::default(),
+            sheet_set: Default::default(),
+            sheet_set_pending_layout: None,
+            sheet_set_import_parent: None,
             bg_picker: None,
             block_palette: Default::default(),
             xref_manager: Default::default(),
diff --git a/src/app/properties.rs b/src/app/properties.rs
index aefb4131b..a6acbe114 100644
--- a/src/app/properties.rs
+++ b/src/app/properties.rs
@@ -3417,25 +3417,7 @@ handles={handles_ms:.1} panel={:.1} ribbon={ribbon_ms:.1} tail={:.1} selected={}
         {
             // Assign a unique viewport ID (max existing id + 1, min 2).
             if let codec::EntityType::Viewport(ref mut vp) = entity {
-                let layout_block = self.tabs[i].scene.current_layout_block_handle_pub();
-                let max_id = self.tabs[i]
-                    .scene
-                    .document
-                    .entities()
-                    .filter_map(|e| {
-                        if let codec::EntityType::Viewport(v) = e {
-                            if v.common.owner_handle == layout_block {
-                                Some(v.id)
-                            } else {
-                                None
-                            }
-                        } else {
-                            None
-                        }
-                    })
-                    .max()
-                    .unwrap_or(1);
-                vp.id = (max_id + 1).max(2);
+                vp.id = self.tabs[i].scene.next_viewport_id();
             }
 
             let layout = self.tabs[i].scene.current_layout.clone();
diff --git a/src/app/settings.rs b/src/app/settings.rs
index 89e1728ae..349d41f27 100644
--- a/src/app/settings.rs
+++ b/src/app/settings.rs
@@ -625,6 +625,9 @@ pub struct UserSettings {
     /// Count - Invalid Area: 0 ask, 1 undo, 2 count all of model space.
     #[serde(default)]
     pub count_invalid_area: u8,
+    /// SSMAUTOOPEN, SSLOCATE, SSMPOLLTIME, SSMSHEETSTATUS.
+    #[serde(default)]
+    pub sheet_set: crate::ui::window::sheet_set::SheetSetSettings,
 }
 
 /// A block the Blocks palette lists from outside the current drawing (a
@@ -877,6 +880,7 @@ impl Default for UserSettings {
             count_error_color: 1,
             count_service: true,
             count_invalid_area: 0,
+            sheet_set: Default::default(),
         }
     }
 }
diff --git a/src/app/update/dialog.rs b/src/app/update/dialog.rs
index 65a04a0d1..90f00c5a6 100644
--- a/src/app/update/dialog.rs
+++ b/src/app/update/dialog.rs
@@ -594,6 +594,10 @@ pub(super) fn on_ribbon_tool_click(&mut self, tool_id: String, event: ModuleEven
                         self.count_palette.show = false;
                         self.ribbon.set_count_palette(false);
                     }
+                    PanelId::SheetSetManager => {
+                        self.sheet_set.show = false;
+                        self.ribbon.set_sheet_set(false);
+                    }
                     PanelId::Properties => {
                         self.show_properties = false;
                         self.ribbon.set_properties(false);
@@ -700,6 +704,7 @@ pub(super) fn on_ribbon_tool_click(&mut self, tool_id: String, event: ModuleEven
             PanelId::NodeGraph => self.show_node_graph,
             PanelId::PointCloudManager => self.pc_manager.show,
             PanelId::Count => self.count_palette.show,
+            PanelId::SheetSetManager => self.sheet_set.show,
         }
     }
 
diff --git a/src/app/update/file.rs b/src/app/update/file.rs
index 7938f71d1..3f1f17652 100644
--- a/src/app/update/file.rs
+++ b/src/app/update/file.rs
@@ -40,7 +40,7 @@ fn write_export(path: &std::path::Path, bytes: &[u8]) -> Result<(), String> {
 /// reaches the UI thread: it is caught on the worker and re-surfaced as
 /// [`Message::BackgroundTaskFailed`] so a crashing export or import reports
 /// on the command line instead of killing the application.
-pub(super) fn background_task<T, F, M>(context: impl Into<String>, work: F, map: M) -> Task<Message>
+pub(in crate::app) fn background_task<T, F, M>(context: impl Into<String>, work: F, map: M) -> Task<Message>
 where
     T: Send + 'static,
     F: FnOnce() -> T + Send + 'static,
@@ -748,6 +748,7 @@ impl OpenCADStudio {
             count_error_color: self.count_palette.error_color,
             count_service: self.count_palette.service,
             count_invalid_area: self.count_palette.invalid_choice,
+            sheet_set: self.sheet_set.settings,
         }
     }
 
@@ -883,6 +884,7 @@ impl OpenCADStudio {
         self.count_palette.error_color = s.count_error_color;
         self.count_palette.service = s.count_service;
         self.count_palette.invalid_choice = s.count_invalid_area.min(2);
+        self.sheet_set.settings = s.sheet_set;
         self.block_palette.recent = s.block_recent.clone();
         self.block_palette.favorites = s.block_favorites.clone();
         self.block_palette.libraries = s.block_libraries.clone();
@@ -2053,7 +2055,8 @@ impl OpenCADStudio {
         } else {
             Task::none()
         };
-        Task::batch([thumbs_task, pending_open_task, interaction_task, startup_script_task])
+        let sheet_set_task = self.sheet_set_after_open(i);
+        Task::batch([thumbs_task, pending_open_task, interaction_task, startup_script_task, sheet_set_task])
     }
 
     pub(super) fn on_wblock_save_result_some(
@@ -2158,6 +2161,7 @@ impl OpenCADStudio {
         self.tabs[i].scene.document.header.user_real1 = self.tabs[i].scene.annotation_scale as f64;
         self.sync_solid_models_for_save(i);
         self.tabs[i].scene.sync_native_parametric_graph();
+        self.stamp_sheet_set_data(i);
     }
 
     #[cfg(not(target_arch = "wasm32"))]
@@ -3311,6 +3315,10 @@ impl OpenCADStudio {
         for i in 0..self.tabs.len() {
             let _ = std::fs::remove_file(self.autosave_target(i));
         }
+        #[cfg(not(target_arch = "wasm32"))]
+        for path in &self.sheet_set.locks {
+            crate::app::commands::sheet_set::release_lock(path);
+        }
     }
 
     /// Remove the autosave recovery files, then quit the application.
@@ -5519,12 +5527,9 @@ impl OpenCADStudio {
         let half_w = view.width.abs() * 0.5;
         let half_h = view.height.abs() * 0.5;
         (half_w > 1e-9 && half_h > 1e-9).then_some(())?;
-        self.area_plot_job((
-            view.center.x - half_w,
-            view.center.y - half_h,
-            view.center.x + half_w,
-            view.center.y + half_h,
-        ))
+        let center = crate::scene::named_view_center(view);
+        let (cx, cy) = (center.x, center.y);
+        self.area_plot_job((cx - half_w, cy - half_h, cx + half_w, cy + half_h))
     }
 
     pub(in crate::app) fn extents_plot_job(&self) -> Option<PdfPageInput> {
diff --git a/src/app/update/mod.rs b/src/app/update/mod.rs
index 5fa43abe4..0681d0e73 100644
--- a/src/app/update/mod.rs
+++ b/src/app/update/mod.rs
@@ -96,6 +96,7 @@ mod blocks_palette;
 mod dialog;
 mod dynamic;
 mod file;
+pub(in crate::app) use file::background_task;
 mod page_setup_import;
 mod style;
 pub(in crate::app) mod util;
@@ -1822,6 +1823,7 @@ impl OpenCADStudio {
             Message::FieldDialog(message) => self.on_field_dialog(message),
             Message::PcManager(message) => self.update_pc_manager(message),
             Message::Count(message) => self.on_count(message),
+            Message::SheetSet(message) => self.on_sheet_set(message),
             Message::RibbonSelectTab(idx) => {
                 self.ribbon.select(idx);
                 Task::none()
@@ -8555,6 +8557,10 @@ impl OpenCADStudio {
                 if self.active_modal == Some(super::ModalKind::CountInvalidArea) {
                     return self.update(Message::Count(crate::ui::window::count_palette::CountMsg::InvalidUndo));
                 }
+                if self.active_modal == Some(super::ModalKind::SheetSet) {
+                    self.close_sheet_set_dialog();
+                    return Task::none();
+                }
                 if self.active_modal == Some(super::ModalKind::Field) {
                     self.close_field_dialog();
                     return Task::none();
diff --git a/src/app/view/mod.rs b/src/app/view/mod.rs
index 021102307..6b3c81c15 100644
--- a/src/app/view/mod.rs
+++ b/src/app/view/mod.rs
@@ -1896,6 +1896,7 @@ bg={bg_ms:.1}ms n={view_count}"
                 crate::ui::dock::PanelId::NodeGraph => self.show_node_graph,
                 crate::ui::dock::PanelId::PointCloudManager => self.pc_manager.show,
                 crate::ui::dock::PanelId::Count => self.count_palette.show,
+                crate::ui::dock::PanelId::SheetSetManager => self.sheet_set.show,
             }
         };
         let edge_stack = |side: crate::app::config::DockSide| -> Option<Element<'_, Message>> {
@@ -2650,6 +2651,17 @@ impl OpenCADStudio {
         };
         #[cfg(target_arch = "wasm32")]
         let plugin_drain = Subscription::none();
+        // While a sheet set is open: it reloads when its .dst changes on disk,
+        // and its sheets' .dwl lock files follow the open tabs.
+        #[cfg(not(target_arch = "wasm32"))]
+        let sheet_set_poll = if self.sheet_set.sets.is_empty() {
+            Subscription::none()
+        } else {
+            iced::time::every(std::time::Duration::from_secs(1))
+                .map(|_| Message::SheetSet(crate::ui::window::sheet_set::SheetSetMsg::Poll))
+        };
+        #[cfg(target_arch = "wasm32")]
+        let sheet_set_poll = Subscription::none();
         let hatch_pattern_keys = if self.tabs[self.active_tab]
             .properties
             .hatch_pattern_picker_open
@@ -2851,6 +2863,7 @@ impl OpenCADStudio {
             web_fonts,
             autosave,
             plugin_drain,
+            sheet_set_poll,
             single_instance,
             hatch_pattern_keys,
             keyboard_events,
@@ -3046,6 +3059,9 @@ impl OpenCADStudio {
                 width,
                 auto_collapse,
             ),
+            crate::ui::dock::PanelId::SheetSetManager => {
+                crate::ui::window::sheet_set::view(&self.sheet_set, width, auto_collapse)
+            }
         };
         let divider = dock_divider(id);
         match side {
diff --git a/src/app/view/modal.rs b/src/app/view/modal.rs
index 5f693e757..3b143fd66 100644
--- a/src/app/view/modal.rs
+++ b/src/app/view/modal.rs
@@ -76,6 +76,7 @@ impl OpenCADStudio {
             Some(K::RecoveryPrompt) => crate::tr!("modal", "recovery-prompt"),
             Some(K::GpuWarning) => crate::tr!("gpu", "title"),
             Some(K::XrefHelp) => crate::t!("Reference Manager Help").into_owned(),
+            Some(K::SheetSet) => self.sheet_set.dialog.as_ref().map(|d| d.title()).unwrap_or_default(),
             None => String::new(),
         }
     }
@@ -581,6 +582,24 @@ impl OpenCADStudio {
                 let state = self.attdef_dialog.as_ref()?;
                 sized_flow(ex, 720, 520, |flow| crate::ui::window::attdef_dialog::view(state, flow))
             }
+            super::super::ModalKind::SheetSet => {
+                let (w, h) = match self.sheet_set.dialog.as_ref()? {
+                    crate::ui::window::sheet_set::SsDialog::Wizard(_) => (720, 560),
+                    crate::ui::window::sheet_set::SsDialog::Properties(_) => (640, 700),
+                    crate::ui::window::sheet_set::SsDialog::Form(f) => match f.kind {
+                        crate::ui::window::sheet_set::FormKind::Rename => (560, 470),
+                        crate::ui::window::sheet_set::FormKind::RenameView => (520, 200),
+                        crate::ui::window::sheet_set::FormKind::ImportLayout => (620, 470),
+                        _ => (560, 420),
+                    },
+                    crate::ui::window::sheet_set::SsDialog::Confirm(..) => (460, 190),
+                    crate::ui::window::sheet_set::SsDialog::Template(_) => (480, 400),
+                    crate::ui::window::sheet_set::SsDialog::Category(_) => (480, 440),
+                    crate::ui::window::sheet_set::SsDialog::BlockList(_) => (540, 330),
+                    crate::ui::window::sheet_set::SsDialog::SelectBlock(_) => (580, 390),
+                };
+                sized_flow(ex, w, h, |flow| crate::ui::window::sheet_set::dialog_view(&self.sheet_set, flow))
+            }
             super::super::ModalKind::Field => {
                 let state = self.field_dialog.as_ref()?;
                 sized_flow(ex, 760, 660, |flow| crate::ui::window::field_dialog::view(state, flow))
diff --git a/src/entities/field.rs b/src/entities/field.rs
index 375250697..a5c2fd25b 100644
--- a/src/entities/field.rs
+++ b/src/entities/field.rs
@@ -71,6 +71,14 @@ impl FieldContext for OcsFieldContext<'_> {
         os_date_locale()
     }
 
+    fn sheet_sets(
+        &self,
+        f: &mut dyn FnMut(&codec::sheet_set::SheetSetDatabase) -> Option<String>,
+    ) -> Option<String> {
+        let sets = SHEET_SETS.read().ok()?;
+        sets.iter().find_map(|db| f(db))
+    }
+
     fn getenv(&self, name: &str) -> Option<String> {
         #[cfg(not(target_arch = "wasm32"))]
         {
@@ -84,6 +92,16 @@ impl FieldContext for OcsFieldContext<'_> {
     }
 }
 
+/// The sheet sets open in the Sheet Set Manager, for `\AcSm` fields. The
+/// manager replaces the list whenever a set opens, closes or changes.
+static SHEET_SETS: std::sync::RwLock<Vec<codec::sheet_set::SheetSetDatabase>> = std::sync::RwLock::new(Vec::new());
+
+pub fn set_sheet_sets(sets: Vec<codec::sheet_set::SheetSetDatabase>) {
+    if let Ok(mut guard) = SHEET_SETS.write() {
+        *guard = sets;
+    }
+}
+
 /// Re-evaluate the field hosted by entity `host` (usually an MTEXT), or `None`
 /// to keep the cached text. Thin wrapper over the library engine.
 pub fn resolve(document: &CadDocument, host: Handle) -> Option<String> {
@@ -369,6 +387,77 @@ pub fn attach_attribute_fields(document: &mut CadDocument, insert: Handle) -> Ve
     document.attach_attribute_fields(insert, &context)
 }
 
+/// Store fresh values for the sheet set fields (after a sheet set changed)
+/// and return the hosts whose text changed. A field no open sheet set
+/// resolves (`####`: its set was closed or not found) keeps its stored value.
+pub fn refresh_sheet_set_fields(document: &mut CadDocument) -> Vec<Handle> {
+    let context = OcsFieldContext(None);
+    let unresolved: Vec<(Handle, String)> = document
+        .fields
+        .values()
+        .filter(|f| f.evaluator.starts_with("AcSm"))
+        .filter(|f| {
+            let host = field_host(document, f.handle).unwrap_or(Handle::NULL);
+            codec::fields::resolve_handle(document, f.handle, host, &context).is_none_or(|v| v == "####")
+        })
+        .map(|f| (f.handle, f.evaluator.clone()))
+        .collect();
+    // ponytail: the engine refreshes every sheet set field, so the unresolved
+    // ones are hidden from it (evaluator cleared) for this one call; a
+    // "skip unresolved" switch in the engine would replace this.
+    for (h, _) in &unresolved {
+        if let Some(f) = document.fields.get_mut(h) {
+            f.evaluator.clear();
+        }
+    }
+    let changed = document.refresh_sheet_set_fields(&context);
+    for (h, evaluator) in unresolved {
+        if let Some(f) = document.fields.get_mut(&h) {
+            f.evaluator = evaluator;
+        }
+    }
+    changed
+}
+
+/// The entity hosting field `field`: up its owner chain (fields, then the
+/// field dictionary and extension dictionary) to the first non-object.
+fn field_host(document: &CadDocument, field: Handle) -> Option<Handle> {
+    let owner = |h: Handle| -> Option<Handle> {
+        if let Some(f) = document.fields.get(&h) {
+            return Some(f.owner);
+        }
+        match document.objects.get(&h)? {
+            codec::objects::ObjectType::Dictionary(d) => Some(d.owner),
+            codec::objects::ObjectType::Unknown { owner, .. } => Some(*owner),
+            _ => None,
+        }
+    };
+    let mut h = field;
+    for _ in 0..12 {
+        let o = owner(h)?;
+        if owner(o).is_none() {
+            return Some(o);
+        }
+        h = o;
+    }
+    None
+}
+
+/// Now as the OS long date, two spaces and the 24-hour time
+/// (`Monday, October 5, 2026  09:26:39`).
+pub fn long_date_time_now() -> String {
+    let locale = os_date_locale();
+    let picture = format!("{}  HH:mm:ss", locale.long_date);
+    let now = now_utc_julian() + utc_offset_days();
+    codec::fields::format_dt_in(codec::fields::julian_parts(now), &picture, &locale)
+}
+
+/// [`attach_attribute_fields`] with every field code passed through `map`.
+pub fn attach_attribute_fields_mapped(document: &mut CadDocument, insert: Handle, map: &dyn Fn(&str) -> String) -> Vec<Handle> {
+    let context = OcsFieldContext(None);
+    document.attach_attribute_fields_mapped(insert, &context, map)
+}
+
 /// Whether any attribute definition of `block` hosts a field.
 pub fn block_has_attribute_fields(document: &CadDocument, block: &str) -> bool {
     let Some(record) = document.block_records.iter().find(|r| r.name.eq_ignore_ascii_case(block)) else {
diff --git a/src/io/mod.rs b/src/io/mod.rs
index 3a4c9d52a..ffaeba33b 100644
--- a/src/io/mod.rs
+++ b/src/io/mod.rs
@@ -759,7 +759,8 @@ pub fn load_bytes(name: &str, bytes: Vec<u8>) -> Result<CadDocument, String> {
         ext.as_str()
     };
     match format {
-        "dwg" => {
+        // Templates (.dwt) and standards (.dws) are drawings in the DWG format.
+        "dwg" | "dwt" | "dws" => {
             let mut doc = DwgReader::from_stream(Cursor::new(bytes))
                 .read()
                 .map_err(|e| e.to_string())?;
@@ -1022,7 +1023,7 @@ fn read_file_attempt(
     };
 
     match effective.as_str() {
-        "dwg" => read_dwg_path(path, progress, failsafe),
+        "dwg" | "dwt" | "dws" => read_dwg_path(path, progress, failsafe),
         "dxf" => read_dxf_path(path, failsafe),
         _ => Err(ReaderFailure::terminal(format!(
             "Unsupported file format: .{ext}"
diff --git a/src/locale_catalog.rs b/src/locale_catalog.rs
index f657dec83..0fa5deb4d 100644
--- a/src/locale_catalog.rs
+++ b/src/locale_catalog.rs
@@ -3,6 +3,167 @@
 
 pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static str)> {
     match source {
+        "Create Sheet Set" => Some(("view", "ss-create-sheet-set")),
+        "Requires an integer between {min} and {max}." => Some(("view", "ss-requires-integer-between")),
+        "New Sheet" => Some(("view", "ss-new-sheet")),
+        "Subset Properties" => Some(("view", "ss-subset-properties")),
+        "Rename & Renumber Sheet" => Some(("view", "ss-rename-renumber-sheet")),
+        "Import Layout as Sheet" => Some(("view", "ss-import-layout-as-sheet")),
+        "Sheet Set Manager" => Some(("view", "ss-sheet-set-manager")),
+        "Open..." => Some(("view", "ss-open")),
+        "Open a sheet set or create one with NEWSHEETSET." => Some(("view", "ss-open-a-sheet-set-or-create-one-with-newsheetset")),
+        "No sheet views." => Some(("view", "ss-no-sheet-views")),
+        "No locations." => Some(("view", "ss-no-locations")),
+        "Double-click opens a sheet. Right-click for more commands." => Some(("view", "ss-double-click-opens-a-sheet-right-click-for-more-commands")),
+        "An empty sheet set" => Some(("view", "ss-an-empty-sheet-set")),
+        "Existing drawings" => Some(("view", "ss-existing-drawings")),
+        "Create a folder hierarchy based on subsets" => Some(("view", "ss-create-a-folder-hierarchy-based-on-subsets")),
+        "Sheet Set Properties..." => Some(("view", "ss-sheet-set-properties")),
+        "Select folders containing drawings. Layouts in the drawings can be added to the sheet set." => Some(("view", "ss-select-folders-containing-drawings-layouts-in-the-drawings-c")),
+        "Sheet Set" => Some(("view", "ss-sheet-set")),
+        "Sheet set data file" => Some(("view", "ss-sheet-set-data-file")),
+        "Sheets to import" => Some(("view", "ss-sheets-to-import")),
+        "Add Custom Property..." => Some(("view", "ss-add-custom-property")),
+        "New Sheet..." => Some(("view", "ss-new-sheet-x")),
+        "New Subset..." => Some(("view", "ss-new-subset")),
+        "Import Layout as Sheet..." => Some(("view", "ss-import-layout-as-sheet-x")),
+        "Rename & Renumber..." => Some(("view", "ss-rename-renumber")),
+        "Close Sheet Set" => Some(("view", "ss-close-sheet-set")),
+        "Properties..." => Some(("view", "ss-properties")),
+        "Sheet List" => Some(("view", "ss-sheet-list")),
+        "Sheet Views" => Some(("view", "ss-sheet-views")),
+        "Model Views" => Some(("view", "ss-model-views")),
+        "Views by sheet" => Some(("view", "ss-views-by-sheet")),
+        "Locations" => Some(("view", "ss-locations")),
+        "Create a sheet set using" => Some(("view", "ss-create-a-sheet-set-using")),
+        "Name of new sheet set:" => Some(("view", "ss-name-of-new-sheet-set")),
+        "Description (optional):" => Some(("view", "ss-description-optional")),
+        "Store sheet set data file (.dst) here:" => Some(("view", "ss-store-sheet-set-data-file-dst-here")),
+        "Choose Layouts" => Some(("view", "ss-choose-layouts")),
+        "Confirm" => Some(("view", "ss-confirm")),
+        "Default value:" => Some(("view", "ss-default-value")),
+        "Owner" => Some(("view", "ss-owner")),
+        "Custom Properties" => Some(("view", "ss-custom-properties")),
+        "Sheet title" => Some(("view", "ss-sheet-title")),
+        "Folder path" => Some(("view", "ss-folder-path")),
+        "Sheet template" => Some(("view", "ss-sheet-template")),
+        "Subset name" => Some(("view", "ss-subset-name")),
+        "New sheet location" => Some(("view", "ss-new-sheet-location")),
+        "Remove Subset" => Some(("view", "ss-remove-subset")),
+        "Rename Subset..." => Some(("view", "ss-rename-subset")),
+        "Content cannot be placed into model space. Please switch to paper space and try again." => Some(("view", "ss-content-model-space")),
+        "cannot be read" => Some(("view", "ss-cannot-read")),
+        "Rename & Renumber View" => Some(("view", "ss-rename-renumber-view")),
+        "List of Blocks" => Some(("view", "ss-list-of-blocks")),
+        "Select Block" => Some(("view", "ss-select-block")),
+        "Set category" => Some(("view", "ss-set-category")),
+        "Place Callout Block" => Some(("view", "ss-place-callout-block")),
+        "Place View Label Block" => Some(("view", "ss-place-view-label-block")),
+        "Place on Sheet" => Some(("view", "ss-place-on-sheet")),
+        "See Model Space Views" => Some(("view", "ss-see-model-space-views")),
+        "View title" => Some(("view", "ss-view-title")),
+        "Add..." => Some(("view", "ss-add-x")),
+        "The following blocks are associated with this sheet set:" => Some(("view", "ss-blocks-associated")),
+        "Enter the drawing file name:" => Some(("view", "ss-enter-drawing-file-name")),
+        "Enter the drawing file name." => Some(("view", "ss-enter-drawing-file-name-msg")),
+        "Select the drawing file as a block" => Some(("view", "ss-select-drawing-as-block")),
+        "Choose blocks in the drawing file:" => Some(("view", "ss-choose-blocks-in-drawing")),
+        "preview" => Some(("view", "ss-preview")),
+        "Open a sheet of this sheet set at its layout to place a view on it." => Some(("view", "ss-open-sheet-to-place")),
+        "Open the view's sheet at its layout to place a block on it." => Some(("view", "ss-open-view-sheet")),
+        "The sheet set has no label block for views." => Some(("view", "ss-no-label-block")),
+        "{}: no view to place." => Some(("view", "ss-no-view-to-place")),
+        "{}: cannot be read." => Some(("view", "ss-cannot-be-read")),
+        "This layout is already part of a sheet set - not available for import." => Some(("view", "ss-layout-already-part")),
+        "Warning: this layout may belong to another sheet set." => Some(("view", "ss-layout-may-belong")),
+        "missing" => Some(("view", "ss-status-missing")),
+        "open" => Some(("view", "ss-status-open")),
+        "View by category" => Some(("view", "ss-view-by-category")),
+        "View by sheet" => Some(("view", "ss-view-by-sheet")),
+        "Import Layouts as Sheets" => Some(("view", "ss-import-layouts-as-sheets")),
+        "Remove Sheets" => Some(("view", "ss-remove-sheets")),
+        "View Category" => Some(("view", "ss-view-category")),
+        "New View Category..." => Some(("view", "ss-new-view-category")),
+        "Add New Location..." => Some(("view", "ss-add-new-location")),
+        "Remove Location" => Some(("view", "ss-remove-location")),
+        "Publish by Sheet 'Include for Publish' Setting" => Some(("view", "ss-publish-by-sheet")),
+        "Do Not Publish Sheets" => Some(("view", "ss-do-not-publish-sheets")),
+        "Open in drawing editor" => Some(("view", "ss-open-in-drawing-editor")),
+        "Create folder hierarchy" => Some(("view", "ss-create-folder-hierarchy")),
+        "Publish sheets in subset" => Some(("view", "ss-publish-sheets-in-subset")),
+        "Rename options" => Some(("view", "ss-rename-options")),
+        "Rename layout to match:" => Some(("view", "ss-rename-layout-to-match")),
+        "Prefix with sheet number" => Some(("view", "ss-prefix-with-sheet-number")),
+        "Rename drawing file to match:" => Some(("view", "ss-rename-drawing-file-to-match")),
+        "Available for import" => Some(("view", "ss-available-for-import")),
+        "Drawings" => Some(("view", "ss-drawings")),
+        "Select drawing files containing layouts" => Some(("view", "ss-select-drawing-files-containing-layouts")),
+        "Browse for Drawings..." => Some(("view", "ss-browse-for-drawings")),
+        "A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it." => Some(("view", "ss-a-layout-can-belong-to-only-one-sheet-set")),
+        "Prefix sheet titles with file name" => Some(("view", "ss-prefix-sheet-titles-with-file-name")),
+        "Import Checked" => Some(("view", "ss-import-checked")),
+        "Template" => Some(("view", "ss-template")),
+        "Drawing template file name" => Some(("view", "ss-drawing-template-file-name")),
+        "Select a layout to create new sheets" => Some(("view", "ss-select-a-layout-to-create-new-sheets")),
+        "Category name" => Some(("view", "ss-category-name")),
+        "Select the callout blocks to be used in this category" => Some(("view", "ss-select-the-callout-blocks")),
+        "Selected blocks will be available for selection when you insert a callout block from the view tab." => Some(("view", "ss-selected-blocks-will-be-available")),
+        "Add Blocks..." => Some(("view", "ss-add-blocks")),
+        "(The layout and the drawing file will not be deleted.)" => Some(("view", "ss-layout-and-drawing-not-deleted")),
+        "Are you sure that you want to remove {} Sheet from {} Sheet Set?" => Some(("view", "ss-remove-sheet-question")),
+        "The drawing is open; close it to rename its file." => Some(("view", "ss-drawing-open-cannot-rename")),
+        "The category name cannot be empty." => Some(("view", "ss-category-name-empty")),
+        "Associate hyperlink" => Some(("view", "ss-associate-hyperlink")),
+        "Remove Sheet" => Some(("view", "ss-remove-sheet")),
+        "Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set." => Some(("view", "ss-lets-you-specify-one-or-more-folders-containing-drawings-the")),
+        "Creates a sheet set with no subsets or sheets." => Some(("view", "ss-creates-a-sheet-set-with-no-subsets-or-sheets")),
+        "Open Sheet Set" => Some(("view", "ss-open-sheet-set")),
+        "Sheet Set (*.dst)" => Some(("view", "ss-sheet-set-dst")),
+        "Browse for Folder" => Some(("view", "ss-browse-for-folder")),
+        "Select Layout as Sheet Template" => Some(("view", "ss-select-layout-as-sheet-template")),
+        "Drawing Template (*.dwt)" => Some(("view", "ss-drawing-template-dwt")),
+        "Drawing (*.dwg)" => Some(("view", "ss-drawing-dwg")),
+        "The name cannot be empty." => Some(("view", "ss-the-name-cannot-be-empty")),
+        "A custom property with this name already exists." => Some(("view", "ss-a-custom-property-with-this-name-already-exists")),
+        "Sheet sets organize layouts from several drawings into one named set of sheets." => Some(("view", "ss-sheet-sets-organize-layouts-from-several-drawings-into-one-n")),
+        "(default new drawing)" => Some(("view", "ss-default-new-drawing")),
+        "Select Drawing" => Some(("view", "ss-select-drawing")),
+        "The sheet set name cannot be empty." => Some(("view", "ss-the-sheet-set-name-cannot-be-empty")),
+        "The folder for the sheet set data file does not exist." => Some(("view", "ss-the-folder-for-the-sheet-set-data-file-does-not-exist")),
+        "The drawing has no layout to use as a sheet template." => Some(("view", "ss-the-drawing-has-no-layout-to-use-as-a-sheet-template")),
+        "The subset name cannot be empty." => Some(("view", "ss-the-subset-name-cannot-be-empty")),
+        "The drawing has no layout to import." => Some(("view", "ss-the-drawing-has-no-layout-to-import")),
+        "The layout is already a sheet of this sheet set." => Some(("view", "ss-the-layout-is-already-a-sheet-of-this-sheet-set")),
+        "The sheet title cannot be empty." => Some(("view", "ss-the-sheet-title-cannot-be-empty")),
+        "The sheet folder cannot be created." => Some(("view", "ss-the-sheet-folder-cannot-be-created")),
+        "Sheet Set Properties" => Some(("view", "ss-sheet-set-properties-x")),
+        "Sheet Properties" => Some(("view", "ss-sheet-properties")),
+        "Sheet drawing not found: {}" => Some(("view", "ss-sheet-drawing-not-found")),
+        "{} already exists." => Some(("view", "ss-already-exists")),
+        "Model view" => Some(("view", "ss-model-view")),
+        "Label block for views" => Some(("view", "ss-label-block-for-views")),
+        "Callout blocks" => Some(("view", "ss-callout-blocks")),
+        "Page setup overrides file" => Some(("view", "ss-page-setup-overrides-file")),
+        "Project Control" => Some(("view", "ss-project-control")),
+        "Sheet Creation" => Some(("view", "ss-sheet-creation")),
+        "Sheet storage location" => Some(("view", "ss-sheet-storage-location")),
+        "Sheet creation template" => Some(("view", "ss-sheet-creation-template")),
+        "Prompt for template" => Some(("view", "ss-prompt-for-template")),
+        "Subset" => Some(("view", "ss-subset")),
+        "Layout name" => Some(("view", "ss-layout-name")),
+        "Drawing file" => Some(("view", "ss-drawing-file")),
+        "Project number" => Some(("view", "ss-project-number")),
+        "Project name" => Some(("view", "ss-project-name")),
+        "Project phase" => Some(("view", "ss-project-phase")),
+        "Project milestone" => Some(("view", "ss-project-milestone")),
+        "Revision number" => Some(("view", "ss-revision-number")),
+        "Revision date" => Some(("view", "ss-revision-date")),
+        "Issue purpose" => Some(("view", "ss-issue-purpose")),
+        "Custom property name" => Some(("view", "ss-custom-property-name")),
+        "Placeholder type" => Some(("view", "ss-placeholder-type")),
+        "Sheet set" => Some(("view", "ss-sheet-set-x")),
+        "Sheet navigation tree" => Some(("view", "ss-sheet-navigation-tree")),
+        "SheetSet" => Some(("view", "ss-sheetset")),
         "Entire drawing" => Some(("common", "entire-drawing")),
         "Delete from drawing" => Some(("common", "delete-from-drawing")),
         "Destination" => Some(("common", "destination")),
@@ -2567,7 +2728,6 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "SETVAR  new value (blank to read):" => Some(("styles", "setvar-new-value-blank-to-read")),
         "SETVAR  variable name:" => Some(("styles", "setvar-variable-name")),
         "SETVAR: {name} requires 0, 1, or 2." => Some(("draw", "setvar-frame-range")),
-        "SHEETSET: Sheet Set Manager not yet implemented." => Some(("view", "sheetset-sheet-set-manager-not-yet-implemented")),
         "SHX" => Some(("properties", "shx")),
         "Connect" => Some(("draw", "sketch-connect")),
         "Exit" => Some(("draw", "sketch-exit")),
@@ -3309,6 +3469,7 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "Usage: VIEW LIST | VIEW SAVE <name> | VIEW RESTORE <name> | VIEW DELETE <name>" => Some(("layers", "usage-view-list-view-save-name-view-restore-na")),
         "Usage: VIEW RESTORE <name>" => Some(("layers", "usage-view-restore-name")),
         "Usage: VIEW SAVE <name>" => Some(("layers", "usage-view-save-name")),
+        "Usage: VIEW WINDOW <name> <x1,y1> <x2,y2>" => Some(("layers", "usage-view-window")),
         "Usage: XDATA LIST | SET <app> <value> | CLEAR [app]" => Some(("view", "usage-xdata-list-set-app-value-clear-app")),
         "Usage: {prefix} FONT <style> <font_file>" => Some(("layers", "usage-prefix-font-style-font-file")),
         "Usage: {prefix} LIST | NEW <name> | FONT <style> <file> | WIDTH <style> <factor> | OBLIQUE <style> <angle>" => Some(("layers", "usage-prefix-list-new-name-font-style-file-wid")),
diff --git a/src/modules/view/sheetset.rs b/src/modules/view/sheetset.rs
index c15680237..d5f582dfb 100644
--- a/src/modules/view/sheetset.rs
+++ b/src/modules/view/sheetset.rs
@@ -5,6 +5,6 @@ pub fn tool() -> ToolDef {
         id: "SHEETSET",
         label: "Sheet Set\nManager",
         icon: ICON,
-        event: ModuleEvent::Command("SHEETSET".to_string()),
+        event: ModuleEvent::Command("_SSMTOGGLE".to_string()),
     }
 }
diff --git a/src/scene/camera_ops.rs b/src/scene/camera_ops.rs
index a1f0ffc2e..679947034 100644
--- a/src/scene/camera_ops.rs
+++ b/src/scene/camera_ops.rs
@@ -166,6 +166,24 @@ fn is_active_vport_name(name: &str) -> bool {
     name.eq_ignore_ascii_case("*Active")
 }
 
+/// The world point a named view is centred on. The VIEW record's centre is
+/// in view (DCS) coordinates, an offset from its target in the view plane.
+/// Views saved by earlier versions of this application stored the target
+/// itself as the centre; that centre (equal to a non-zero target) is taken
+/// as the target, not as an offset from it.
+pub fn named_view_center(view: &codec::tables::View) -> glam::DVec3 {
+    use glam::{DQuat, DVec3};
+    let target = DVec3::new(view.target.x, view.target.y, view.target.z);
+    let (cx, cy) = (view.center.x, view.center.y);
+    let tol = 1e-9 * target.length().max(1.0);
+    let legacy = (target.x != 0.0 || target.y != 0.0) && (cx - target.x).abs() <= tol && (cy - target.y).abs() <= tol;
+    if legacy {
+        return target;
+    }
+    let eye = DVec3::new(view.direction.x, view.direction.y, view.direction.z).try_normalize().unwrap_or(DVec3::Z);
+    target + DQuat::from_rotation_arc(DVec3::Z, eye) * DVec3::new(cx, cy, 0.0)
+}
+
 impl Scene {
     /// A geometry mutation makes every fitted Model camera AABB stale. Clear
     /// both the live camera and inactive tile snapshots immediately so no view
@@ -189,7 +207,6 @@ impl Scene {
         use glam::Vec3;
         let cam = &mut *self.camera.borrow_mut();
         // The stored direction points from the target toward the eye.
-        cam.target = glam::DVec3::new(view.target.x, view.target.y, view.target.z);
         let eye_dir = Vec3::new(
             view.direction.x as f32,
             view.direction.y as f32,
@@ -202,6 +219,7 @@ impl Scene {
         };
         // Build rotation: canonical eye is +Z, rotate to eye_dir.
         cam.rotation = glam::Quat::from_rotation_arc(Vec3::Z, eye_dir);
+        cam.target = named_view_center(view);
         // Sync yaw/pitch from new rotation (for ViewCube).
         let pitch = eye_dir.z.clamp(-1.0, 1.0).asin();
         let yaw = eye_dir.x.atan2(eye_dir.y);
@@ -224,13 +242,11 @@ impl Scene {
         let cam = self.camera.borrow();
         let eye_dir = cam.rotation * glam::Vec3::Z;
         let height = cam.ortho_size() * 2.0;
-        let width = height; // caller can adjust; rough square
+        // The window's shape: the last rendered aspect ratio.
+        let width = height * self.active_camera_aspect();
         let mut view = codec::tables::View::new(name);
-        view.center = Vector3 {
-            x: cam.target.x as f64,
-            y: cam.target.y as f64,
-            z: 0.0,
-        };
+        // The centre is in view (DCS) coordinates, relative to the target.
+        view.center = Vector3 { x: 0.0, y: 0.0, z: 0.0 };
         view.target = Vector3 {
             x: cam.target.x as f64,
             y: cam.target.y as f64,
diff --git a/src/scene/mod.rs b/src/scene/mod.rs
index 6134a7955..27806038d 100644
--- a/src/scene/mod.rs
+++ b/src/scene/mod.rs
@@ -37,6 +37,7 @@ pub use page_setup::{apply_default_page_setup, document_page_setups, rotated_mar
 mod dwg_native_constraints;
 mod entity;
 pub use entity::CreateBlockOptions;
+pub use camera_ops::named_view_center;
 #[cfg(test)]
 mod hatch_boundary;
 mod group_layer;
@@ -4561,6 +4562,22 @@ impl Scene {
         self.current_layout_block_handle()
     }
 
+    /// A unique id for a new viewport on the current layout: one past the
+    /// largest id there, at least 2 (1 is the layout's own paper viewport).
+    pub fn next_viewport_id(&self) -> i16 {
+        let layout_block = self.current_layout_block_handle();
+        let max_id = self
+            .document
+            .entities()
+            .filter_map(|e| match e {
+                codec::EntityType::Viewport(v) if v.common.owner_handle == layout_block => Some(v.id),
+                _ => None,
+            })
+            .max()
+            .unwrap_or(1);
+        (max_id + 1).max(2)
+    }
+
     /// True when an entity belongs to the active layout, including imported
     /// DXF entities whose owner handle is NULL but whose BlockRecord still
     /// lists the entity. Keep command validation aligned with the same
diff --git a/src/ui/dock.rs b/src/ui/dock.rs
index 9cab6440c..3cbe3bf94 100644
--- a/src/ui/dock.rs
+++ b/src/ui/dock.rs
@@ -50,6 +50,8 @@ pub enum PanelId {
     PointCloudManager,
     /// Block counts (COUNTLIST).
     Count,
+    /// The open sheet sets: subsets and sheets.
+    SheetSetManager,
 }
 
 impl PanelId {
@@ -63,6 +65,7 @@ impl PanelId {
             PanelId::NodeGraph => "Node Graph",
             PanelId::PointCloudManager => "Point Cloud Manager",
             PanelId::Count => "Count",
+            PanelId::SheetSetManager => "Sheet Set Manager",
         }
     }
 
@@ -76,6 +79,7 @@ impl PanelId {
             PanelId::NodeGraph => 220.0,
             PanelId::PointCloudManager => 280.0,
             PanelId::Count => 280.0,
+            PanelId::SheetSetManager => 280.0,
         }
     }
 
@@ -167,6 +171,7 @@ impl DockState {
             PanelId::NodeGraph,
             PanelId::PointCloudManager,
             PanelId::Count,
+            PanelId::SheetSetManager,
         ] {
             self.panels.entry(id).or_insert_with(|| DockPanel::for_id(id));
         }
diff --git a/src/ui/icons.rs b/src/ui/icons.rs
index a2b5af4e7..0e0e2ae80 100644
--- a/src/ui/icons.rs
+++ b/src/ui/icons.rs
@@ -59,6 +59,8 @@ static LAY_ULK: &[u8] = include_bytes!("../../assets/icons/layers/layulk.svg");
 pub static CHECK: &[u8] = include_bytes!("../../assets/icons/ui/check.svg");
 pub static CLOSE: &[u8] = include_bytes!("../../assets/icons/ui/close.svg");
 pub static PLUS: &[u8] = include_bytes!("../../assets/icons/ui/plus.svg");
+pub static REFRESH: &[u8] = include_bytes!("../../assets/icons/ui/refresh.svg");
+pub static SWAP: &[u8] = include_bytes!("../../assets/icons/ui/swap.svg");
 pub static MINUS: &[u8] = include_bytes!("../../assets/icons/ui/minus.svg");
 pub static TRASH: &[u8] = include_bytes!("../../assets/icons/ui/trash.svg");
 pub static NODE_GRAPH: &[u8] = include_bytes!("../../assets/icons/ui/node_graph.svg");
diff --git a/src/ui/ribbon/mod.rs b/src/ui/ribbon/mod.rs
index c98ae83a5..3f7bcbcb4 100644
--- a/src/ui/ribbon/mod.rs
+++ b/src/ui/ribbon/mod.rs
@@ -60,6 +60,8 @@ pub struct Ribbon {
     pub show_properties: bool,
     /// The Count palette is open (View › Palettes › Count).
     pub show_count_palette: bool,
+    /// Sheet Set Manager palette shown (SSMSTATE).
+    pub show_sheet_set: bool,
     /// File tabs (FILETAB) visibility — drives the File Tabs button highlight.
     pub show_file_tabs: bool,
     /// Layout tabs (LAYOUTTAB) visibility — drives the Layout Tabs button highlight.
@@ -177,6 +179,7 @@ impl Ribbon {
             show_ucs_icon: true,
             show_properties: true,
             show_count_palette: false,
+            show_sheet_set: false,
             show_file_tabs: true,
             show_layout_tabs: true,
             open_dropdown: None,
@@ -341,6 +344,9 @@ impl Ribbon {
     pub fn set_count_palette(&mut self, on: bool) {
         self.show_count_palette = on;
     }
+    pub fn set_sheet_set(&mut self, on: bool) {
+        self.show_sheet_set = on;
+    }
     pub fn set_file_tabs(&mut self, on: bool) {
         self.show_file_tabs = on;
     }
@@ -360,6 +366,7 @@ impl Ribbon {
             show_properties: self.show_properties,
             show_count_palette: self.show_count_palette,
             show_block_palette,
+            show_sheet_set: self.show_sheet_set,
             show_file_tabs: self.show_file_tabs,
             show_layout_tabs: self.show_layout_tabs,
         }
diff --git a/src/ui/ribbon/widgets.rs b/src/ui/ribbon/widgets.rs
index 89bb1de2f..5db4b88b6 100644
--- a/src/ui/ribbon/widgets.rs
+++ b/src/ui/ribbon/widgets.rs
@@ -39,6 +39,7 @@ pub(super) struct ToggleState {
     pub show_properties: bool,
     pub show_count_palette: bool,
     pub show_block_palette: bool,
+    pub show_sheet_set: bool,
     pub show_file_tabs: bool,
     pub show_layout_tabs: bool,
 }
@@ -382,6 +383,7 @@ pub(super) fn is_active_tool(
         "PROPERTIES" => state.show_properties,
         "COUNTLIST" => state.show_count_palette,
         "BLOCKPALETTE" => state.show_block_palette,
+        "SHEETSET" => state.show_sheet_set,
         "FILETAB" => state.show_file_tabs,
         "LAYOUTTAB" => state.show_layout_tabs,
         id => active_tool.as_deref() == Some(id),
diff --git a/src/ui/window/block_palette.rs b/src/ui/window/block_palette.rs
index 17527437a..a84fda8e9 100644
--- a/src/ui/window/block_palette.rs
+++ b/src/ui/window/block_palette.rs
@@ -378,6 +378,11 @@ impl<'a> Program<Message> for BlockPreviewCanvas<'a> {
     }
 }
 
+/// A block preview (the palette's canvas) for other dialogs.
+pub(crate) fn preview_canvas<'a>(wires: &'a [WireModel], height: f32) -> Element<'a, Message> {
+    canvas(BlockPreviewCanvas { wires }).width(Fill).height(Length::Fixed(height)).into()
+}
+
 fn pm(m: BlockPaletteMsg) -> Message {
     Message::BlockPalette(m)
 }
diff --git a/src/ui/window/field_dialog.rs b/src/ui/window/field_dialog.rs
index 17dce8304..d693dc0bd 100644
--- a/src/ui/window/field_dialog.rs
+++ b/src/ui/window/field_dialog.rs
@@ -38,8 +38,234 @@ pub const CATEGORIES: &[(&str, &[&str])] = &[
         "Plot",
         &["DeviceName", "Login", "PageSetupName", "PaperSize", "PlotDate", "PlotOrientation", "PlotScale", "PlotStyleTable"],
     ),
+    ("SheetSet", SHEET_SET_FIELDS),
 ];
 
+/// The SheetSet category, in the reference's order.
+pub const SHEET_SET_FIELDS: &[&str] = &[
+    "CurrentSheetCategory",
+    "CurrentSheetCustom",
+    "CurrentSheetDescription",
+    "CurrentSheetIssuePurpose",
+    "CurrentSheetNumber",
+    "CurrentSheetNumberAndTitle",
+    "CurrentSheetRevisionDate",
+    "CurrentSheetRevisionNumber",
+    "CurrentSheetSet",
+    "CurrentSheetSetCustom",
+    "CurrentSheetSetDescription",
+    "CurrentSheetSetProjectMilestone",
+    "CurrentSheetSetProjectName",
+    "CurrentSheetSetProjectNumber",
+    "CurrentSheetSetProjectPhase",
+    "CurrentSheetSubSet",
+    "CurrentSheetTitle",
+    "SheetSet",
+    "SheetSetPlaceholder",
+    "SheetView",
+];
+
+/// A sheet set field's code without format: `\AcSm[.16.2] Component.Property`.
+fn sheet_set_code(name: &str, custom: &str) -> String {
+    let (version, target) = match name {
+        "CurrentSheetCategory" => (".16.2", "Sheet.Category".to_string()),
+        "CurrentSheetCustom" => ("", format!("Sheet.{custom}")),
+        "CurrentSheetDescription" => ("", "Sheet.Description".into()),
+        "CurrentSheetIssuePurpose" => (".16.2", "Sheet.IssuePurpose".into()),
+        "CurrentSheetNumber" => ("", "Sheet.Number".into()),
+        "CurrentSheetNumberAndTitle" => ("", "Sheet.NumberAndTitle".into()),
+        "CurrentSheetRevisionDate" => (".16.2", "Sheet.RevisionDate".into()),
+        "CurrentSheetRevisionNumber" => (".16.2", "Sheet.RevisionNumber".into()),
+        "CurrentSheetSet" => ("", "SheetSet.Name".into()),
+        "CurrentSheetSetCustom" => ("", format!("SheetSet.{custom}")),
+        "CurrentSheetSetDescription" => ("", "SheetSet.Description".into()),
+        "CurrentSheetSetProjectMilestone" => (".16.2", "SheetSet.ProjectMilestone".into()),
+        "CurrentSheetSetProjectName" => (".16.2", "SheetSet.ProjectName".into()),
+        "CurrentSheetSetProjectNumber" => (".16.2", "SheetSet.ProjectNumber".into()),
+        "CurrentSheetSetProjectPhase" => (".16.2", "SheetSet.ProjectPhase".into()),
+        "CurrentSheetSubSet" => ("", "Subset.Name".into()),
+        "CurrentSheetTitle" => ("", "Sheet.Title".into()),
+        _ => return "\\AcSm".into(),
+    };
+    format!("\\AcSm{version} {target}")
+}
+
+/// The navigation tree of a SheetSet (set, subsets, sheets) or SheetView
+/// (set, view categories) field: depth, component id, label, is a sheet.
+pub fn nav_nodes(db: &codec::sheet_set::SheetSetDatabase, views: bool) -> Vec<(u16, String, String, bool)> {
+    use codec::sheet_set::{number_and_title, ComponentKind, Element as SsElement};
+    let set = db.sheet_set();
+    let mut out = vec![(0, set.id().to_string(), db.name().to_string(), false)];
+    if views {
+        // Views of the unnamed (default) category sit under the set, then each
+        // named category with its views.
+        let all: Vec<&SsElement> = db.sheets().into_iter().flat_map(|s| db.sheet_views(s)).collect();
+        let named: Vec<&SsElement> = db.view_categories();
+        let in_named = |v: &SsElement| {
+            codec::sheet_set::SheetSetDatabase::view_category_of(v).is_some_and(|c| named.iter().any(|n| n.id() == c))
+        };
+        for v in all.iter().filter(|v| !in_named(v)) {
+            out.push((1, v.id().to_string(), number_and_title(v), true));
+        }
+        for c in &named {
+            out.push((1, c.id().to_string(), c.prop("Name").unwrap_or("").to_string(), false));
+            for v in all.iter().filter(|v| codec::sheet_set::SheetSetDatabase::view_category_of(v) == Some(c.id())) {
+                out.push((2, v.id().to_string(), number_and_title(v), true));
+            }
+        }
+        return out;
+    }
+    fn go(el: &SsElement, depth: u16, out: &mut Vec<(u16, String, String, bool)>) {
+        for c in &el.children {
+            match ComponentKind::of(c) {
+                Some(ComponentKind::Subset) => {
+                    out.push((depth, c.id().to_string(), c.prop("Name").unwrap_or("").to_string(), false));
+                    go(c, depth + 1, out);
+                }
+                Some(ComponentKind::Sheet) => out.push((depth, c.id().to_string(), number_and_title(c), true)),
+                _ => {}
+            }
+        }
+    }
+    go(set, 1, &mut out);
+    out
+}
+
+/// The properties a navigation node offers: list label, code property, version.
+pub fn nav_props(db: &codec::sheet_set::SheetSetDatabase, id: &str) -> Vec<(String, String, &'static str)> {
+    use codec::sheet_set::{custom_properties, ComponentKind, CUSTOM_SHEET_PROP, CUSTOM_SHEET_SET_PROP};
+    let Some(el) = db.find(id) else { return Vec::new() };
+    let fixed = |list: &[(&str, &str, &'static str)]| -> Vec<(String, String, &'static str)> {
+        list.iter().map(|(l, p, v)| (l.to_string(), p.to_string(), *v)).collect()
+    };
+    let custom = |flag: i32| -> Vec<(String, String, &'static str)> {
+        custom_properties(db.sheet_set()).into_iter().filter(|(_, _, f)| f & flag != 0).map(|(n, _, _)| (n.clone(), n, "")).collect()
+    };
+    match ComponentKind::of(el) {
+        Some(ComponentKind::SheetSet) => {
+            let mut v = fixed(&[
+                ("SheetSetName", "Name", ""),
+                ("SheetSetDescription", "Description", ""),
+                ("ProjectNumber", "ProjectNumber", ".16.2"),
+                ("ProjectName", "ProjectName", ".16.2"),
+                ("ProjectPhase", "ProjectPhase", ".16.2"),
+                ("ProjectMilestone", "ProjectMilestone", ".16.2"),
+            ]);
+            v.extend(custom(CUSTOM_SHEET_SET_PROP));
+            v
+        }
+        Some(ComponentKind::Subset) => fixed(&[("SheetSubsetName", "Name", "")]),
+        Some(ComponentKind::Sheet) => {
+            let mut v = fixed(&[
+                ("SheetNumberAndTitle", "NumberAndTitle", ""),
+                ("SheetTitle", "Title", ""),
+                ("SheetNumber", "Number", ""),
+                ("SheetDescription", "Description", ""),
+                ("RevisionNumber", "RevisionNumber", ".16.2"),
+                ("RevisionDate", "RevisionDate", ".16.2"),
+                ("IssuePurpose", "IssuePurpose", ".16.2"),
+                ("Category", "Category", ".16.2"),
+            ]);
+            v.extend(custom(CUSTOM_SHEET_PROP));
+            v
+        }
+        None if el.name == "AcSmSheetView" => fixed(&[
+            ("ViewNumberAndTitle", "NumberAndTitle", ""),
+            ("ViewTitle", "Title", ""),
+            ("ViewNumber", "Number", ""),
+            ("ViewportScale", "ViewportScale", ".16.2"),
+        ]),
+        None => fixed(&[("ViewCategoryName", "Name", "")]),
+    }
+}
+
+/// The sheet drawing, named view and layout a sheet or sheet view node links to.
+pub fn nav_link(db: &codec::sheet_set::SheetSetDatabase, id: &str) -> Option<(String, String, String)> {
+    let el = db.find(id)?;
+    let (sheet, view) = if el.name == "AcSmSheetView" {
+        let views = db.parent_of(id)?;
+        let sheet = db.parent_of(views.id())?;
+        (sheet.id().to_string(), el.named("NamedView").and_then(|v| v.prop("Name")).unwrap_or("").to_string())
+    } else if codec::sheet_set::ComponentKind::of(el) == Some(codec::sheet_set::ComponentKind::Sheet) {
+        (id.to_string(), String::new())
+    } else {
+        return None;
+    };
+    let r = db.layout_reference(&sheet, "Layout")?;
+    Some((r.file_name, view, r.name))
+}
+
+impl FieldDialogState {
+    /// `\AcSm Database("…").SheetSet("…")[.Component("…")].Property` of the
+    /// picked node, with the text case and, on a sheet, the hyperlink to it.
+    fn navigation_code(&self) -> String {
+        let Some(db) = self.ss_sets.get(self.ss_set) else { return "\\AcSm".into() };
+        let Some((_, prop, version)) = nav_props(db, &self.ss_node).into_iter().find(|(l, _, _)| *l == self.ss_prop) else {
+            return "\\AcSm".into();
+        };
+        let set = db.sheet_set().id().to_string();
+        let path = codec::sheet_set::native_path(db.path.as_deref().unwrap_or(""));
+        // ViewportScale takes a scale format (and its version), not a text case.
+        let scale = prop == "ViewportScale";
+        let version = if scale {
+            codec::fields::PLOT_SCALE_FORMATS
+                .get(self.ss_scale_format)
+                .map_or("", |(_, c)| if c.starts_with("\\AcVar.16.2") { ".16.2" } else { "" })
+        } else {
+            version
+        };
+        let mut code = format!("\\AcSm{version} Database(\"{path}\").SheetSet(\"{set}\")");
+        if self.ss_node != set {
+            code.push_str(&format!(".Component(\"{}\")", self.ss_node));
+        }
+        code.push('.');
+        code.push_str(&prop);
+        if scale {
+            let f = viewport_scale_picture(self.ss_scale_format);
+            if !f.is_empty() {
+                code.push(' ');
+                code.push_str(&f);
+            }
+            return code;
+        }
+        if self.text_case != 0 {
+            code.push_str(&format!(" \\f \"%tc{}\"", self.text_case));
+        }
+        // A sheet links to its layout, a view to its named view on the sheet.
+        if self.ss_href {
+            if let Some((file, view, layout)) = nav_link(db, &self.ss_node) {
+                code.push_str(&format!(" \\href \"{file}#{view},{layout}##1\""));
+            }
+        }
+        code
+    }
+}
+
+/// SheetSetPlaceholder types: list label, the `?` target, field version.
+pub const PLACEHOLDER_TYPES: &[(&str, &str, &str)] = &[
+    ("SheetNumberAndTitle", "?Sheet.NumberAndTitle", ""),
+    ("SheetTitle", "?Sheet.Title", ""),
+    ("SheetNumber", "?Sheet.Number", ""),
+    ("SheetDescription", "?Sheet.Description", ""),
+    ("RevisionNumber", "?Sheet.RevisionNumber", ".16.2"),
+    ("RevisionDate", "?Sheet.RevisionDate", ".16.2"),
+    ("IssuePurpose", "?Sheet.IssuePurpose", ".16.2"),
+    ("Category", "?Sheet.Category", ".16.2"),
+    ("Custom", "?Sheet.", ""),
+    ("ViewNumberAndTitle", "?View.NumberAndTitle", ""),
+    ("ViewTitle", "?View.Title", ""),
+    ("ViewNumber", "?View.Number", ""),
+    ("ViewportScale", "?View.ViewportScale", ".16.2"),
+];
+
+/// ViewportScale placeholder formats: the PlotScale pictures.
+pub fn viewport_scale_picture(k: usize) -> String {
+    codec::fields::PLOT_SCALE_FORMATS
+        .get(k)
+        .and_then(|(_, code)| code.find("\\f ").map(|p| code[p..].to_string()))
+        .unwrap_or_default()
+}
+
 /// The fields of a category; "All" lists every field once, sorted.
 pub fn fields_of(category: usize) -> Vec<&'static str> {
     if category == 0 {
@@ -79,6 +305,13 @@ pub enum FieldKind {
     PlotScale,
     /// Count / CountInArea: a JSON expression.
     Count,
+    /// A CurrentSheet* / CurrentSheetSet* field (text case).
+    SheetSet,
+    /// CurrentSheetCustom / CurrentSheetSetCustom (text case + property).
+    SheetSetCustom,
+    SheetSetPlaceholder,
+    /// SheetSet / SheetView: a component picked in a sheet set.
+    SheetSetNavigation,
     BlockPlaceholder,
 }
 
@@ -99,6 +332,10 @@ pub fn kind_of(name: &str) -> FieldKind {
         "Hyperlink" => FieldKind::Hyperlink,
         "PlotScale" => FieldKind::PlotScale,
         "Count" | "CountInArea" => FieldKind::Count,
+        "CurrentSheetCustom" | "CurrentSheetSetCustom" => FieldKind::SheetSetCustom,
+        "SheetSetPlaceholder" => FieldKind::SheetSetPlaceholder,
+        "SheetSet" | "SheetView" => FieldKind::SheetSetNavigation,
+        n if SHEET_SET_FIELDS.contains(&n) => FieldKind::SheetSet,
         "BlockPlaceholder" => FieldKind::BlockPlaceholder,
         _ => FieldKind::Text,
     }
@@ -141,6 +378,23 @@ pub struct FieldDialogState {
     /// Index into codec BLOCK_PLACEHOLDER_PROPERTIES.
     pub placeholder_property: usize,
     pub preview: String,
+    /// Sheet set fields: the open set's sheet (flags 2) and set (flags 1)
+    /// custom property names, the chosen one, the placeholder type and the
+    /// ViewportScale format.
+    pub ss_sheet_custom: Vec<String>,
+    pub ss_set_custom: Vec<String>,
+    pub ss_custom: String,
+    pub ss_placeholder: usize,
+    pub ss_scale_format: usize,
+    /// The open sheet set's name (SheetSet / SheetView fields).
+    pub ss_set_name: String,
+    /// SheetSet / SheetView: the sets offered (open ones and any picked with
+    /// "..."), the one shown, the node and property picked, associate hyperlink.
+    pub ss_sets: Vec<codec::sheet_set::SheetSetDatabase>,
+    pub ss_set: usize,
+    pub ss_node: String,
+    pub ss_prop: String,
+    pub ss_href: bool,
     /// Today in each of DATE_FORMATS, for the Examples list.
     pub examples: Vec<String>,
 }
@@ -174,6 +428,17 @@ impl FieldDialogState {
             placeholder_block: None,
             placeholder_property: 7,
             preview: String::new(),
+            ss_sheet_custom: Vec::new(),
+            ss_set_custom: Vec::new(),
+            ss_custom: String::new(),
+            ss_placeholder: 0,
+            ss_scale_format: 6,
+            ss_set_name: String::new(),
+            ss_sets: Vec::new(),
+            ss_set: 0,
+            ss_node: String::new(),
+            ss_prop: String::new(),
+            ss_href: true,
             examples: Vec::new(),
         }
     }
@@ -234,6 +499,25 @@ impl FieldDialogState {
                     json => (format!("\\{evaluator} {json}"), vec![]),
                 }
             }
+            FieldKind::SheetSet | FieldKind::SheetSetCustom => (case(sheet_set_code(self.name, &self.ss_custom)), vec![]),
+            FieldKind::SheetSetNavigation => (self.navigation_code(), vec![]),
+            FieldKind::SheetSetPlaceholder => {
+                let (label, target, version) = PLACEHOLDER_TYPES[self.ss_placeholder.min(PLACEHOLDER_TYPES.len() - 1)];
+                let target = if label == "Custom" { format!("{target}{}", self.ss_custom) } else { target.to_string() };
+                if label == "ViewportScale" {
+                    // The version follows the format, as for PlotScale.
+                    let version = codec::fields::PLOT_SCALE_FORMATS
+                        .get(self.ss_scale_format)
+                        .map_or("", |(_, code)| if code.starts_with("\\AcVar.16.2") { ".16.2" } else { "" });
+                    let base = format!("\\AcSm{version} {target}");
+                    match viewport_scale_picture(self.ss_scale_format) {
+                        f if f.is_empty() => (base, vec![]),
+                        f => (format!("{base} {f}"), vec![]),
+                    }
+                } else {
+                    (case(format!("\\AcSm{version} {target}")), vec![])
+                }
+            }
             FieldKind::BlockPlaceholder => {
                 let (_, property, format) = codec::fields::BLOCK_PLACEHOLDER_PROPERTIES[self.placeholder_property];
                 // Text properties take the chosen case; the others keep their own format.
@@ -345,6 +629,15 @@ pub enum FieldDialogMsg {
     PlotScale(usize),
     CountExpression(String),
     ShowCountInstances,
+    SsCustom(String),
+    SsPlaceholder(usize),
+    SsScaleFormat(usize),
+    SsSet(usize),
+    SsNode(String),
+    SsProp(String),
+    SsHref(bool),
+    SsBrowse,
+    SsPicked(Option<std::path::PathBuf>),
     Help,
     Ok,
 }
@@ -648,6 +941,123 @@ fn format_panel<'a>(state: &'a FieldDialogState) -> Element<'a, Message> {
         .spacing(8)
         .into(),
         FieldKind::Count => column![].into(),
+        FieldKind::SheetSet => column![text(t!("Format")).size(12), case_list(state)].spacing(8).into(),
+        FieldKind::SheetSetCustom => {
+            let names = if state.name == "CurrentSheetCustom" { &state.ss_sheet_custom } else { &state.ss_set_custom };
+            column![
+                text(t!("Format")).size(12),
+                case_list(state),
+                text(t!("Custom property name")).size(12),
+                pick_list(
+                    (!state.ss_custom.is_empty()).then(|| state.ss_custom.clone()),
+                    names.clone(),
+                    |s: &String| s.clone(),
+                )
+                .on_select(|s| msg(FieldDialogMsg::SsCustom(s)))
+                .text_size(12)
+                .padding([5, 8])
+                .width(Fill),
+            ]
+            .spacing(8)
+            .into()
+        }
+        FieldKind::SheetSetPlaceholder => {
+            let kind = PLACEHOLDER_TYPES[state.ss_placeholder.min(PLACEHOLDER_TYPES.len() - 1)].0;
+            let types = list(
+                PLACEHOLDER_TYPES
+                    .iter()
+                    .enumerate()
+                    .map(|(i, (n, _, _))| (n.to_string(), state.ss_placeholder == i, FieldDialogMsg::SsPlaceholder(i)))
+                    .collect(),
+                200.0,
+            );
+            let format: Element<'a, Message> = if kind == "ViewportScale" {
+                list(
+                    codec::fields::PLOT_SCALE_FORMATS
+                        .iter()
+                        .enumerate()
+                        .map(|(i, (n, _))| (t!(*n).into_owned(), state.ss_scale_format == i, FieldDialogMsg::SsScaleFormat(i)))
+                        .collect(),
+                    170.0,
+                )
+            } else {
+                case_list(state)
+            };
+            let mut col = column![text(t!("Placeholder type")).size(12), types, text(t!("Format")).size(12), format].spacing(8);
+            if kind == "Custom" {
+                col = col.push(text(t!("Custom property name")).size(12)).push(
+                    pick_list(
+                        (!state.ss_custom.is_empty()).then(|| state.ss_custom.clone()),
+                        state.ss_sheet_custom.clone(),
+                        |s: &String| s.clone(),
+                    )
+                    .on_select(|s| msg(FieldDialogMsg::SsCustom(s)))
+                    .text_size(12)
+                    .padding([5, 8])
+                    .width(Fill),
+                );
+            }
+            col.into()
+        }
+        FieldKind::SheetSetNavigation => {
+            let picks: Vec<Pick> = state.ss_sets.iter().enumerate().map(|(i, d)| Pick(i, d.name().to_string())).collect();
+            let current = picks.get(state.ss_set).cloned();
+            let set_row = row![
+                pick_list(current, picks, |p: &Pick| p.1.clone())
+                    .on_select(|p: Pick| msg(FieldDialogMsg::SsSet(p.0)))
+                    .text_size(12)
+                    .padding([5, 8])
+                    .width(Fill),
+                button(text("...").size(12)).on_press(msg(FieldDialogMsg::SsBrowse)).style(button_style(false)).padding([5, 10]),
+            ]
+            .spacing(6);
+            let db = state.ss_sets.get(state.ss_set);
+            let nodes = db.map(|d| nav_nodes(d, state.name == "SheetView")).unwrap_or_default();
+            let tree = list(
+                nodes
+                    .iter()
+                    .map(|(depth, id, label, _)| {
+                        (format!("{}{label}", "    ".repeat(usize::from(*depth))), *id == state.ss_node, FieldDialogMsg::SsNode(id.clone()))
+                    })
+                    .collect(),
+                118.0,
+            );
+            let props = db.map(|d| nav_props(d, &state.ss_node)).unwrap_or_default();
+            let prop_list = list(
+                props.iter().map(|(l, _, _)| (l.clone(), *l == state.ss_prop, FieldDialogMsg::SsProp(l.clone()))).collect(),
+                92.0,
+            );
+            let linkable = db.is_some_and(|d| nav_link(d, &state.ss_node).is_some()) && state.ss_prop != "ViewportScale";
+            let mut href = checkbox(state.ss_href && linkable).label(t!("Associate hyperlink").into_owned()).text_size(12).size(14);
+            if linkable {
+                href = href.on_toggle(|v| msg(FieldDialogMsg::SsHref(v)));
+            }
+            let format: Element<'a, Message> = if state.ss_prop == "ViewportScale" {
+                list(
+                    codec::fields::PLOT_SCALE_FORMATS
+                        .iter()
+                        .enumerate()
+                        .map(|(i, (n, _))| (t!(*n).into_owned(), state.ss_scale_format == i, FieldDialogMsg::SsScaleFormat(i)))
+                        .collect(),
+                    120.0,
+                )
+            } else {
+                case_list(state)
+            };
+            column![
+                text(t!("Sheet set")).size(12),
+                set_row,
+                text(t!("Sheet navigation tree")).size(12),
+                tree,
+                text(t!("Property")).size(12),
+                prop_list,
+                text(t!("Format")).size(12),
+                format,
+                href,
+            ]
+            .spacing(8)
+            .into()
+        }
         FieldKind::Object => column![
             row![
                 text(t!("Object type")).size(12).width(Length::Fixed(96.0)),
@@ -771,6 +1181,7 @@ pub fn view<'a>(
         ]
         .spacing(10),
         FieldKind::BlockPlaceholder => column![card(t!("Block placeholder").into_owned(), format_panel(state)), preview].spacing(10),
+        FieldKind::SheetSetNavigation => column![card(t!("Sheet set").into_owned(), format_panel(state)), preview].spacing(10),
         _ => column![card(t!("Format").into_owned(), format_panel(state)), preview].spacing(10),
     };
     let (code, _) = state.code();
diff --git a/src/ui/window/mod.rs b/src/ui/window/mod.rs
index 3f3fafc09..38b974c57 100644
--- a/src/ui/window/mod.rs
+++ b/src/ui/window/mod.rs
@@ -28,6 +28,7 @@ pub mod find_replace;
 pub mod named_parameters;
 pub mod pc_manager;
 pub mod count_palette;
+pub mod sheet_set;
 pub mod pdf_dialogs;
 pub mod xref_attach;
 pub mod xref_help;
diff --git a/src/ui/window/sheet_set.rs b/src/ui/window/sheet_set.rs
new file mode 100644
index 000000000..1bf1c0d2a
--- /dev/null
+++ b/src/ui/window/sheet_set.rs
@@ -0,0 +1,1799 @@
+//! Sheet Set Manager (SHEETSET): the open sheet sets as a tree of subsets
+//! and sheets, the New Sheet Set wizard (NEWSHEETSET), the Sheet Set /
+//! Subset / Sheet Properties dialog and the small New Sheet, New Subset,
+//! Import Layout and Rename & Renumber forms. The tree is read from the
+//! sheet set database (`.dst`) itself on every view.
+
+use crate::app::Message;
+use crate::t;
+use crate::ui::dock::PanelId;
+use crate::ui::style::common::muted_style;
+use crate::ui::style::form::{button_style, dialog_button, field_style};
+use crate::ui::window::pdf_dialogs::{accent_text, card_style};
+use codec::sheet_set::{self as ss, ComponentKind, Element as SsElement, SheetSetDatabase};
+use iced::widget::{
+    button, checkbox, column, container, mouse_area, pick_list, row, scrollable, text, text_input, Space,
+};
+use iced::{Background, Border, Element, Fill, Length, Theme};
+use serde::{Deserialize, Serialize};
+use std::collections::HashSet;
+
+const SET_ICON: &[u8] = include_bytes!("../../../assets/icons/sheetset.svg");
+
+/// SSMAUTOOPEN, SSLOCATE, SSMPOLLTIME and SSMSHEETSTATUS: profile settings.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(default)]
+pub struct SheetSetSettings {
+    pub auto_open: u8,
+    pub locate: u8,
+    pub poll_time: u16,
+    pub sheet_status: u8,
+}
+
+impl Default for SheetSetSettings {
+    fn default() -> Self {
+        Self { auto_open: 1, locate: 1, poll_time: 60, sheet_status: 2 }
+    }
+}
+
+/// The palette's three pages.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+pub enum SsmTab {
+    #[default]
+    SheetList,
+    SheetViews,
+    ModelViews,
+}
+
+/// The palette and the open sheet sets.
+#[derive(Debug, Default)]
+pub struct SheetSetManager {
+    pub show: bool,
+    pub settings: SheetSetSettings,
+    /// Open sheet sets (each read from its `.dst`).
+    pub sets: Vec<SheetSetDatabase>,
+    /// The set the palette shows.
+    pub current: Option<usize>,
+    pub tab: SsmTab,
+    /// Folded subset / set ids.
+    pub collapsed: HashSet<String>,
+    /// Highlighted component id.
+    pub selected: Option<String>,
+    /// SSFOUND: the `.dst` the last opened sheet drawing named, when found.
+    pub found: String,
+    /// The open dialog (shown in the `SheetSet` modal).
+    pub dialog: Option<SsDialog>,
+    /// Last seen modification time of each open `.dst` (by path key).
+    pub seen: std::collections::HashMap<String, std::time::SystemTime>,
+    /// Sheet status by sheet id (SSMSHEETSTATUS) and when it was taken.
+    pub status: std::collections::HashMap<String, SheetStatus>,
+    pub status_at: Option<iced::time::Instant>,
+    /// Sheet Views: by category (else by sheet).
+    pub by_category: bool,
+    /// Model Views: location id, folder and its drawings.
+    pub locations: Vec<(String, String, Vec<String>)>,
+    /// Drawings this application holds `.dwl` / `.dwl2` lock files for.
+    pub locks: HashSet<std::path::PathBuf>,
+    /// Model Views: drawings shown open (path keys) and their named model
+    /// views, read when a drawing is opened in the tree.
+    pub open_drawings: HashSet<String>,
+    pub model_views: std::collections::HashMap<String, Vec<String>>,
+    /// What the pending insertion point places.
+    pub placing: Option<Placing>,
+    /// A named view to show once the sheet drawing being opened is up.
+    pub pending_view: Option<String>,
+    /// The fly-out submenu open in a row menu (its key).
+    pub submenu: Option<String>,
+    /// Block previews (`file|name`; no name: the whole drawing).
+    pub previews: std::collections::HashMap<String, Vec<crate::scene::model::wire_model::WireModel>>,
+    /// Drawings read for Model Views, placement and blocks, by path key.
+    pub drawings: DrawingCache,
+}
+
+/// Drawings read from disk with their modification time; a changed file is
+/// read again (off the UI thread, see [`read_drawing`]).
+#[derive(Default)]
+pub struct DrawingCache(
+    pub std::collections::HashMap<String, (std::time::SystemTime, std::sync::Arc<codec::CadDocument>)>,
+);
+
+impl std::fmt::Debug for DrawingCache {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "DrawingCache({} drawings)", self.0.len())
+    }
+}
+
+impl DrawingCache {
+    /// The drawing at `path` when it was read and is unchanged since.
+    pub fn get(&self, path: &str) -> Option<std::sync::Arc<codec::CadDocument>> {
+        let modified = std::fs::metadata(path).and_then(|m| m.modified()).ok()?;
+        let (t, doc) = self.0.get(&ss::path_key(path))?;
+        (*t == modified).then(|| doc.clone())
+    }
+
+    pub fn insert(&mut self, path: &str, modified: std::time::SystemTime, doc: std::sync::Arc<codec::CadDocument>) {
+        self.0.insert(ss::path_key(path), (modified, doc));
+    }
+
+    /// Take the drawing at `path` out (to lend it to a scene); put it back
+    /// with [`DrawingCache::insert`].
+    pub fn take(&mut self, path: &str) -> Option<(std::time::SystemTime, std::sync::Arc<codec::CadDocument>)> {
+        self.0.remove(&ss::path_key(path))
+    }
+}
+
+/// A drawing read for the cache (its modification time and document).
+#[derive(Clone)]
+pub struct ReadDrawing(pub Result<(std::time::SystemTime, std::sync::Arc<codec::CadDocument>), String>);
+
+impl std::fmt::Debug for ReadDrawing {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(if self.0.is_ok() { "ReadDrawing(Ok)" } else { "ReadDrawing(Err)" })
+    }
+}
+
+/// Read the drawing at `path` (run on a worker thread).
+pub fn read_drawing(path: &str) -> ReadDrawing {
+    let modified = std::fs::metadata(path).and_then(|m| m.modified()).map_err(|e| e.to_string());
+    ReadDrawing(modified.and_then(|t| {
+        let doc = crate::io::load_file(std::path::Path::new(path)).map_err(|e| e.to_string())?;
+        Ok((t, std::sync::Arc::new(doc)))
+    }))
+}
+
+/// The paper-space layouts (name, handle) and the sheet link of a drawing
+/// picked for Import Layout as Sheet, or why it could not be read.
+pub type ImportRead = Result<(Vec<(String, String)>, Option<codec::sheet_set::SheetSetData>), String>;
+
+/// A row menu item: an entry, a separator, or a fly-out submenu (label, key, items).
+#[derive(Debug, Clone)]
+pub enum Mi {
+    Entry(String, Option<Message>),
+    Sep,
+    Sub(String, String, Vec<(String, Option<Message>)>),
+}
+
+/// What a sheet set point pick places on the current sheet.
+#[derive(Debug, Clone)]
+pub enum Placing {
+    /// Place on Sheet: a model drawing and its named view (`None`: the
+    /// drawing's extents).
+    View { set: usize, sheet: String, drawing: String, view: Option<String> },
+    /// A callout or view label block (file, block name) for sheet view `view`.
+    Block { set: usize, sheet: String, view: String, file: String, name: String },
+}
+
+/// Commands of a sheet view row.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ViewAction {
+    Display,
+    Rename,
+    /// Set the view's category.
+    Category(String),
+    /// Place a callout block (its id in the set's callout blocks).
+    Callout(String),
+    Label,
+}
+
+/// A sheet whose drawing is missing, or open (a `.dwl` lock file, or a tab here).
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum SheetStatus {
+    Missing,
+    Locked,
+}
+
+impl SheetSetManager {
+    pub fn db(&self) -> Option<&SheetSetDatabase> {
+        self.sets.get(self.current?)
+    }
+
+    pub fn db_mut(&mut self) -> Option<&mut SheetSetDatabase> {
+        self.sets.get_mut(self.current?)
+    }
+}
+
+/// Right-click commands of a tree row.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum MenuAction {
+    Open,
+    NewSheet,
+    NewSubset,
+    ImportLayout,
+    Rename,
+    Remove,
+    Properties,
+    Close,
+}
+
+#[derive(Debug, Clone)]
+pub enum SheetSetMsg {
+    /// The set combo: a set by index, or `None` for "Open...".
+    PickSet(Option<usize>),
+    Tab(SsmTab),
+    Expand(String),
+    Select(String),
+    /// Double-click: open the sheet's drawing at its layout.
+    Activate(String),
+    Menu(String, MenuAction),
+    Refresh,
+    /// Once a second: reload sets whose `.dst` changed on disk.
+    Poll,
+    /// Import: Browse for Drawings and the drawings picked.
+    BrowseDrawings,
+    ImportAdd(Vec<std::path::PathBuf>),
+    /// The drawings picked for import, read: into a new Import dialog
+    /// (`true`) or replacing the open dialog's rows.
+    ImportRead(bool, Vec<(std::path::PathBuf, ImportRead)>),
+    /// A drawing read for the cache, then the message that needed it.
+    DrawingRead(String, ReadDrawing, Box<SheetSetMsg>),
+    /// The wizard's folder of existing drawings, scanned for layouts.
+    FolderScanned(std::path::PathBuf, Vec<FoundLayout>),
+    /// Rename & Renumber: apply and go to the previous / next sheet.
+    Previous,
+    Next,
+    /// Sheet Views: by category or by sheet.
+    ViewsByCategory(bool),
+    NewCategory,
+    CategoryProperties(String),
+    CategoryRemove(String),
+    AddBlocks,
+    BlocksPicked(Option<std::path::PathBuf>),
+    /// Model Views.
+    AddLocation,
+    LocationPicked(Option<std::path::PathBuf>),
+    RemoveLocation(String),
+    OpenDrawing(String),
+    /// Model Views: open / fold a drawing (its named views), See Model Space
+    /// Views, Place on Sheet (drawing, named view).
+    ToggleDrawing(String),
+    SeeViews(String),
+    PlaceOnSheet(String, Option<String>),
+    /// Sheet Views: a view row's command.
+    ViewMenu(String, ViewAction),
+    /// List of Blocks / Select Block.
+    BlockListSelect(usize),
+    /// A row menu's fly-out submenu opened (hovered) or closed.
+    Submenu(Option<String>),
+    BlockListAdd,
+    BlockListDelete,
+    SelectBlockBrowse,
+    SelectBlockPicked(Option<std::path::PathBuf>),
+    SelectBlockWhole(bool),
+    SelectBlockCheck(usize, bool),
+    /// A `.dst` picked by Open (or given by automation).
+    OpenPicked(Option<std::path::PathBuf>),
+    /// A drawing picked by Import Layout as Sheet.
+    ImportPicked(Option<std::path::PathBuf>),
+    /// A folder picked for a dialog field.
+    FolderPicked(FieldId, Option<std::path::PathBuf>),
+    /// A template drawing picked for a sheet creation template.
+    TemplatePicked(Option<std::path::PathBuf>),
+    Browse(FieldId),
+    BrowseTemplate,
+    /// Edit a text field of the open dialog.
+    Input(FieldId, String),
+    Toggle(FieldId, bool),
+    Choose(FieldId, usize),
+    Wizard(WizardMsg),
+    /// Open the Properties dialog from the wizard.
+    WizardProperties,
+    AddCustom,
+    AddCustomOk,
+    AddCustomCancel,
+    /// A custom property row's value.
+    CustomValue(usize, String),
+    Ok,
+    Cancel,
+    Help,
+}
+
+#[derive(Debug, Clone)]
+pub enum WizardMsg {
+    Step(u8),
+    Existing(bool),
+    /// Toggle one drawing layout of the "existing drawings" page.
+    LayoutOn(usize, bool),
+    RemoveFolder(usize),
+}
+
+/// Text fields, toggles and lists of the dialogs.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum FieldId {
+    /// A Properties row by index.
+    Row(usize),
+    Name,
+    Description,
+    Folder,
+    Hierarchy,
+    Number,
+    Title,
+    FileName,
+    /// The layout list of Import Layout as Sheet.
+    Layout,
+    /// Add Custom Property: name, default value, owner (0 set, 1 sheet).
+    CustomName,
+    CustomDefault,
+    CustomOwner,
+    /// A wizard "existing drawings" folder to add.
+    AddFolder,
+    /// Prompt for template (Properties).
+    PromptTemplate,
+    OpenAfter,
+    Publish,
+    LayoutName,
+    /// Rename option 0..4.
+    RenameOption(usize),
+    ImportRow(usize),
+    ImportPrefix,
+    /// View Category: a callout block's check box.
+    CategoryBlock(usize),
+}
+
+/// What a Properties row edits.
+#[derive(Debug, Clone, PartialEq)]
+pub enum RowKey {
+    /// An `AcSmProp` of the component.
+    Prop(&'static str),
+    /// A file reference property (`NewSheetLocation`).
+    Folder(&'static str),
+    /// The sheet creation template (`DefDwtLayout`): the value shows
+    /// `Layout (file)`; `template` holds the picked drawing and layout.
+    Template,
+    /// Yes / No: prompt for template.
+    PromptTemplate,
+    /// Publish Sheets in Subset (`OverrideSheetPublish`).
+    Publish,
+    /// Shown only.
+    ReadOnly,
+}
+
+#[derive(Debug, Clone)]
+pub struct PropRow {
+    pub group: &'static str,
+    pub label: &'static str,
+    pub key: RowKey,
+    pub value: String,
+}
+
+/// The Sheet Set / Subset / Sheet Properties dialog.
+#[derive(Debug, Clone)]
+pub struct Properties {
+    /// `None` edits the wizard's draft set.
+    pub set: Option<usize>,
+    pub component: String,
+    pub kind: ComponentKind,
+    pub title: String,
+    pub rows: Vec<PropRow>,
+    /// Name, value, flags.
+    pub custom: Vec<(String, String, i32)>,
+    /// Add Custom Property being filled: name, default value, owner is sheet.
+    pub adding: Option<(String, String, bool)>,
+    /// The template picked in this dialog: drawing and layout.
+    pub template: Option<(String, String)>,
+    /// Back to the wizard on OK / Cancel.
+    pub wizard: Option<Box<Wizard>>,
+    pub error: Option<String>,
+}
+
+/// One layout found by the "existing drawings" wizard page.
+#[derive(Debug, Clone)]
+pub struct FoundLayout {
+    pub folder: String,
+    pub file: String,
+    pub layout: String,
+    pub handle: String,
+    pub on: bool,
+}
+
+/// NEWSHEETSET.
+#[derive(Debug, Clone)]
+pub struct Wizard {
+    /// 0 Begin, 1 Sheet Set Details, 2 Choose Layouts (existing drawings), 3 Confirm.
+    pub step: u8,
+    pub existing: bool,
+    pub name: String,
+    pub description: String,
+    pub folder: String,
+    pub hierarchy: bool,
+    pub folders: Vec<String>,
+    pub layouts: Vec<FoundLayout>,
+    /// The set being built: name, description, properties and custom
+    /// properties go into it; Finish writes it.
+    pub draft: SheetSetDatabase,
+    pub error: Option<String>,
+}
+
+/// New Sheet, New Subset, Rename & Renumber and Import Layout as Sheet.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+pub enum FormKind {
+    #[default]
+    NewSheet,
+    NewSubset,
+    Rename,
+    ImportLayout,
+    /// Rename & Renumber View.
+    RenameView,
+}
+
+/// One layout of Import Layouts as Sheets.
+#[derive(Debug, Clone)]
+pub struct ImportRow {
+    pub drawing: String,
+    pub layout: String,
+    pub handle: String,
+    /// Already a sheet of this set: cannot be imported.
+    pub taken: bool,
+    /// The drawing's sheet link names another sheet set (importable, warned).
+    pub warn: bool,
+    pub on: bool,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct Form {
+    pub kind: FormKind,
+    pub set: usize,
+    /// Parent (new sheet / subset / import) or the sheet / subset renamed.
+    pub component: String,
+    pub number: String,
+    pub title: String,
+    pub file_name: String,
+    pub folder: String,
+    /// The sheet template picked when the subset prompts for one (file, layout).
+    pub drawing: String,
+    pub template: Option<(String, String)>,
+    /// New Sheet: open the new sheet afterwards.
+    pub open_after: bool,
+    /// New Subset: folder hierarchy; publish sheets by their own setting.
+    pub hierarchy: bool,
+    pub publish: bool,
+    /// Rename & Renumber: layout name and the four rename options
+    /// (layout = title, layout prefix, file = title, file prefix).
+    pub layout_name: String,
+    pub rename: [bool; 4],
+    /// Import: the layouts found and "prefix sheet titles with file name".
+    pub rows: Vec<ImportRow>,
+    pub prefix: bool,
+    pub error: Option<String>,
+}
+
+/// Select Layout as Sheet Template (a subset that prompts for its template).
+#[derive(Debug, Clone)]
+pub struct TemplatePick {
+    pub form: Form,
+    pub file: String,
+    pub layouts: Vec<String>,
+    pub layout: usize,
+}
+
+/// The View Category dialog.
+#[derive(Debug, Clone)]
+pub struct Category {
+    pub set: usize,
+    /// `None` creates a category.
+    pub id: Option<String>,
+    pub name: String,
+    /// Callout block id (`new:file|name|handle` until saved), label, used.
+    pub blocks: Vec<(String, String, bool)>,
+    /// Callout blocks deleted in List of Blocks.
+    pub removed: Vec<String>,
+    pub error: Option<String>,
+}
+
+/// List of Blocks: the set's callout blocks (id, label).
+#[derive(Debug, Clone)]
+pub struct BlockList {
+    pub category: Box<Category>,
+    pub blocks: Vec<(String, String)>,
+    pub selected: Option<usize>,
+    /// Preview of the selected block (`file|name`).
+    pub preview: Option<String>,
+}
+
+/// Select Block: a drawing, taken whole or by its named blocks.
+#[derive(Debug, Clone)]
+pub struct SelectBlock {
+    pub list: Box<BlockList>,
+    pub file: String,
+    pub whole: bool,
+    /// Block name, handle, checked.
+    pub names: Vec<(String, String, bool)>,
+    /// Preview shown (`file|name`).
+    pub preview: Option<String>,
+    pub error: Option<String>,
+}
+
+#[derive(Debug, Clone)]
+pub enum SsDialog {
+    Wizard(Wizard),
+    Properties(Properties),
+    Form(Form),
+    /// Remove Sheets confirmation: set, sheet id, question.
+    Confirm(usize, String, String),
+    Template(TemplatePick),
+    Category(Category),
+    BlockList(BlockList),
+    SelectBlock(SelectBlock),
+}
+
+impl SsDialog {
+    pub fn title(&self) -> String {
+        match self {
+            SsDialog::Wizard(_) => t!("Create Sheet Set").into_owned(),
+            SsDialog::Properties(p) => p.title.clone(),
+            SsDialog::Form(f) => match f.kind {
+                FormKind::NewSheet => t!("New Sheet").into_owned(),
+                FormKind::NewSubset => t!("Subset Properties").into_owned(),
+                FormKind::Rename => t!("Rename & Renumber Sheet").into_owned(),
+                FormKind::ImportLayout => t!("Import Layouts as Sheets").into_owned(),
+                FormKind::RenameView => t!("Rename & Renumber View").into_owned(),
+            },
+            SsDialog::BlockList(_) => t!("List of Blocks").into_owned(),
+            SsDialog::SelectBlock(_) => t!("Select Block").into_owned(),
+            SsDialog::Confirm(..) => t!("Remove Sheets").into_owned(),
+            SsDialog::Template(_) => t!("Select Layout as Sheet Template").into_owned(),
+            SsDialog::Category(_) => t!("View Category").into_owned(),
+        }
+    }
+}
+
+fn msg(m: SheetSetMsg) -> Message {
+    Message::SheetSet(m)
+}
+
+// ── palette ──────────────────────────────────────────────────────────────────
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+struct Pick(Option<usize>, String);
+
+impl std::fmt::Display for Pick {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.1)
+    }
+}
+
+fn menu_entry(label: String, m: Option<Message>) -> Element<'static, Message> {
+    button(text(label).size(12))
+        .width(Fill)
+        .padding([5, 12])
+        .on_press_maybe(m)
+        .style(|theme: &Theme, status| {
+            let mut s = button::text(theme, status);
+            if matches!(status, button::Status::Hovered) {
+                s.background = Some(Background::Color(theme.palette().primary.base.color));
+                s.text_color = theme.palette().primary.base.text;
+            }
+            s
+        })
+        .into()
+}
+
+fn menu_separator() -> Element<'static, Message> {
+    container(Space::new())
+        .height(1)
+        .width(Fill)
+        .style(|theme: &Theme| container::Style {
+            background: Some(Background::Color(theme.palette().background.neutral.color)),
+            ..Default::default()
+        })
+        .into()
+}
+
+/// A row's right-click menu.
+/// The reference's order per row kind; a sheet's New Sheet / Import work on
+/// its subset, and only an empty subset can be removed.
+fn row_menu(id: String, kind: ComponentKind, empty: bool) -> Element<'static, Message> {
+    let entry = |label: &str, action: MenuAction, on: bool| {
+        menu_entry(t!(label).into_owned(), on.then(|| msg(SheetSetMsg::Menu(id.clone(), action))))
+    };
+    let mut items = Vec::new();
+    match kind {
+        ComponentKind::SheetSet => items.extend([entry("Close Sheet Set", MenuAction::Close, true), menu_separator()]),
+        ComponentKind::Sheet => items.extend([entry("Open", MenuAction::Open, true), menu_separator()]),
+        ComponentKind::Subset => {}
+    }
+    items.push(entry("New Sheet...", MenuAction::NewSheet, true));
+    if kind != ComponentKind::Sheet {
+        items.push(entry("New Subset...", MenuAction::NewSubset, true));
+    }
+    items.push(entry("Import Layout as Sheet...", MenuAction::ImportLayout, true));
+    match kind {
+        ComponentKind::SheetSet => {}
+        ComponentKind::Subset => items.extend([
+            menu_separator(),
+            entry("Rename Subset...", MenuAction::Properties, true),
+            entry("Remove Subset", MenuAction::Remove, empty),
+        ]),
+        ComponentKind::Sheet => items.extend([
+            menu_separator(),
+            entry("Rename & Renumber...", MenuAction::Rename, true),
+            entry("Remove Sheet", MenuAction::Remove, true),
+        ]),
+    }
+    items.push(menu_separator());
+    items.push(entry("Properties...", MenuAction::Properties, true));
+    container(iced::widget::Column::with_children(items).spacing(1))
+        .padding(4)
+        .width(Length::Fixed(220.0))
+        .style(|theme: &Theme| container::Style {
+            background: Some(Background::Color(theme.palette().background.weak.color)),
+            border: Border { color: theme.palette().background.neutral.color, width: 1.0, radius: 4.0.into() },
+            ..Default::default()
+        })
+        .into()
+}
+
+/// A small status badge after a sheet name.
+fn badge<'a>(prefix: &str, label: &str, warn: bool) -> Element<'a, Message> {
+    container(text(format!("{prefix}{}", t!(label))).size(10))
+        .padding([0, 5])
+        .style(move |theme: &Theme| {
+            let p = theme.palette();
+            let c = if warn { p.warning.base } else { p.secondary.base };
+            container::Style {
+                background: Some(Background::Color(c.color)),
+                text_color: Some(c.text),
+                border: Border { radius: 7.0.into(), ..Default::default() },
+                ..Default::default()
+            }
+        })
+        .into()
+}
+
+/// A tree row of the Sheet Views / Model Views pages with its own menu.
+fn plain_row<'a>(
+    depth: u16,
+    icon: &'static [u8],
+    label: String,
+    fold: Option<(bool, Message)>,
+    double: Option<Message>,
+    menu: Vec<Mi>,
+    open_sub: Option<String>,
+) -> Element<'a, Message> {
+    let arrow: Element<'a, Message> = match fold {
+        Some((open, m)) => button(if open { crate::ui::icons::themed_arrow_down(10.0) } else { crate::ui::icons::themed_arrow_right(10.0) })
+            .on_press(m)
+            .style(button::text)
+            .padding(2)
+            .into(),
+        None => Space::new().width(14).into(),
+    };
+    let cells = row![
+        Space::new().width(Length::Fixed(f32::from(depth) * 16.0)),
+        arrow,
+        crate::ui::icons::semantic(icon, 14.0),
+        text(label).size(12).width(Fill),
+    ]
+    .spacing(5)
+    .align_y(iced::Center);
+    let mut area = mouse_area(container(cells).width(Fill).padding([3, 6]));
+    if let Some(m) = double {
+        area = area.on_double_click(m);
+    }
+    if menu.is_empty() {
+        return area.into();
+    }
+    iced_aw::ContextMenu::new(area, move || menu_panel(&menu, open_sub.as_deref())).into()
+}
+
+fn menu_box<'b>(items: Vec<Element<'b, Message>>) -> Element<'b, Message> {
+    container(iced::widget::Column::with_children(items).spacing(1))
+        .padding(4)
+        .width(Length::Fixed(240.0))
+        .style(|theme: &Theme| container::Style {
+            background: Some(Background::Color(theme.palette().background.weak.color)),
+            border: Border { color: theme.palette().background.neutral.color, width: 1.0, radius: 4.0.into() },
+            ..Default::default()
+        })
+        .into()
+}
+
+/// A row's right-click menu. A submenu expands in place below its entry
+/// while hovered (a click would close the menu).
+fn menu_panel(menu: &[Mi], open: Option<&str>) -> Element<'static, Message> {
+    let mut items: Vec<Element<'static, Message>> = Vec::new();
+    for item in menu {
+        match item {
+            Mi::Sep => items.push(menu_separator()),
+            Mi::Entry(label, m) => items.push(menu_entry(label.clone(), m.clone())),
+            Mi::Sub(label, key, sub) => {
+                let expanded = open == Some(key.as_str());
+                let arrow = if expanded {
+                    crate::ui::icons::themed_arrow_down(9.0)
+                } else {
+                    crate::ui::icons::themed_arrow_right(9.0)
+                };
+                let header = container(row![text(label.clone()).size(12).width(Fill), arrow].align_y(iced::Center))
+                    .width(Fill)
+                    .padding([5, 12]);
+                items.push(mouse_area(header).on_enter(msg(SheetSetMsg::Submenu(Some(key.clone())))).into());
+                if expanded {
+                    for (l, m) in sub {
+                        items.push(container(menu_entry(l.clone(), m.clone())).padding(iced::Padding::ZERO.left(12)).into());
+                    }
+                }
+            }
+        }
+    }
+    menu_box(items)
+}
+
+/// A menu item: translated label and message (an empty label is a separator).
+fn mi(label: &str, m: Option<Message>) -> Mi {
+    if label.is_empty() { Mi::Sep } else { Mi::Entry(t!(label).into_owned(), m) }
+}
+
+fn tree_row<'a>(
+    state: &SheetSetManager,
+    el: &SsElement,
+    depth: u16,
+    icon: &'static [u8],
+    label: String,
+    fold: Option<bool>,
+) -> Element<'a, Message> {
+    let id = el.id().to_string();
+    let kind = ComponentKind::of(el).unwrap_or(ComponentKind::Sheet);
+    let arrow: Element<'a, Message> = match fold {
+        Some(open) => button(if open {
+            crate::ui::icons::themed_arrow_down(10.0)
+        } else {
+            crate::ui::icons::themed_arrow_right(10.0)
+        })
+        .on_press(msg(SheetSetMsg::Expand(id.clone())))
+        .style(button::text)
+        .padding(2)
+        .into(),
+        None => Space::new().width(14).into(),
+    };
+    let selected = state.selected.as_deref() == Some(id.as_str());
+    let status = state.status.get(&id).copied();
+    let mut cells = row![
+        Space::new().width(Length::Fixed(f32::from(depth) * 16.0)),
+        arrow,
+        crate::ui::icons::semantic(icon, 14.0),
+    ]
+    .spacing(5)
+    .align_y(iced::Center);
+    let name = text(label).size(12);
+    cells = match status {
+        // A missing drawing: grey with a "? missing" badge; an open one: a lock badge.
+        Some(SheetStatus::Missing) => {
+            cells.push(name.style(muted_style)).push(badge("? ", "missing", true)).push(Space::new().width(Fill))
+        }
+        Some(SheetStatus::Locked) => cells.push(name).push(badge("", "open", false)).push(Space::new().width(Fill)),
+        None => cells.push(name.width(Fill)),
+    };
+    let area = mouse_area(container(cells).width(Fill).padding([3, 6]).style(move |theme: &Theme| container::Style {
+        background: selected.then(|| Background::Color(theme.palette().primary.weak.color)),
+        text_color: selected.then(|| theme.palette().primary.weak.text),
+        ..Default::default()
+    }))
+    .on_press(msg(SheetSetMsg::Select(id.clone())))
+    .on_double_click(msg(SheetSetMsg::Activate(id.clone())));
+    let empty = !el.children.iter().any(|c| matches!(ComponentKind::of(c), Some(ComponentKind::Subset | ComponentKind::Sheet)));
+    iced_aw::ContextMenu::new(area, move || row_menu(id.clone(), kind, empty)).into()
+}
+
+fn push_tree<'a>(
+    state: &SheetSetManager,
+    el: &SsElement,
+    depth: u16,
+    out: &mut Vec<Element<'a, Message>>,
+) {
+    for c in &el.children {
+        match ComponentKind::of(c) {
+            Some(ComponentKind::Subset) => {
+                let open = !state.collapsed.contains(c.id());
+                out.push(tree_row(state, c, depth, crate::ui::icons::FOLDER_OPEN, c.prop("Name").unwrap_or("").to_string(), Some(open)));
+                if open {
+                    push_tree(state, c, depth + 1, out);
+                }
+            }
+            Some(ComponentKind::Sheet) => {
+                out.push(tree_row(state, c, depth, crate::ui::icons::DOC, ss::number_and_title(c), None));
+            }
+            _ => {}
+        }
+    }
+}
+
+/// A sheet view row and its menu: Display, Rename & Renumber, Set category
+/// (the categories as sub-items), Place Callout Block (the set's callout
+/// blocks as sub-items) and Place View Label Block.
+fn view_row<'a>(state: &SheetSetManager, db: &SheetSetDatabase, view: &SsElement, depth: u16) -> Element<'a, Message> {
+    let id = view.id().to_string();
+    let act = |a: ViewAction| Some(msg(SheetSetMsg::ViewMenu(id.clone(), a)));
+    let categories = db.view_categories().iter().map(|c| (c.prop("Name").unwrap_or("").to_string(), act(ViewAction::Category(c.id().to_string())))).collect();
+    let callouts = db.callout_blocks().iter().map(|b| (b.prop("Name").unwrap_or("").to_string(), act(ViewAction::Callout(b.id().to_string())))).collect();
+    let menu = vec![
+        mi("Display", act(ViewAction::Display)),
+        mi("Rename & Renumber...", act(ViewAction::Rename)),
+        Mi::Sep,
+        Mi::Sub(t!("Set category").into_owned(), format!("{id}|category"), categories),
+        Mi::Sub(t!("Place Callout Block").into_owned(), format!("{id}|callout"), callouts),
+        mi("Place View Label Block", act(ViewAction::Label)),
+    ];
+    plain_row(depth, crate::ui::icons::DOC, ss::number_and_title(view), None, act(ViewAction::Display), menu, state.submenu.clone())
+}
+
+/// The Sheet Views page: the set, then its view categories (or sheets) and their views.
+fn sheet_views_rows<'a>(state: &SheetSetManager, db: &SheetSetDatabase) -> Vec<Element<'a, Message>> {
+    let new_category = || mi("New View Category...", Some(msg(SheetSetMsg::NewCategory)));
+    let mut rows = vec![plain_row(0, SET_ICON, db.name().to_string(), None, None, vec![new_category()], None)];
+    let views: Vec<&SsElement> = db.sheets().into_iter().flat_map(|s| db.sheet_views(s)).collect();
+    if state.by_category {
+        let named = db.view_categories();
+        // Views of the unnamed (default) category sit directly under the set.
+        for v in views.iter().filter(|v| !SheetSetDatabase::view_category_of(v).is_some_and(|c| named.iter().any(|n| n.id() == c))) {
+            rows.push(view_row(state, db, v, 1));
+        }
+        for c in named {
+            let id = c.id().to_string();
+            rows.push(plain_row(
+                1,
+                crate::ui::icons::FOLDER_OPEN,
+                c.prop("Name").unwrap_or("").to_string(),
+                None,
+                Some(msg(SheetSetMsg::CategoryProperties(id.clone()))),
+                vec![
+                    new_category(),
+                    mi("Properties...", Some(msg(SheetSetMsg::CategoryProperties(id.clone())))),
+                    mi("Remove", Some(msg(SheetSetMsg::CategoryRemove(id.clone())))),
+                ],
+                None,
+            ));
+            for v in views.iter().filter(|v| SheetSetDatabase::view_category_of(v) == Some(id.as_str())) {
+                rows.push(view_row(state, db, v, 2));
+            }
+        }
+    } else {
+        for sheet in db.sheets() {
+            let views = db.sheet_views(sheet);
+            if views.is_empty() {
+                continue;
+            }
+            rows.push(plain_row(1, crate::ui::icons::DOC, ss::number_and_title(sheet), None, None, vec![], None));
+            for v in views {
+                rows.push(view_row(state, db, v, 2));
+            }
+        }
+    }
+    rows
+}
+
+/// The Model Views page: each location folder, its drawings and, for an
+/// opened drawing, its named model views.
+fn model_views_rows<'a>(state: &SheetSetManager) -> Vec<Element<'a, Message>> {
+    let mut rows = Vec::new();
+    // A location shows relative to the set's folder when it can.
+    let base = state.db().and_then(|db| db.path.as_deref()).and_then(|p| std::path::Path::new(p).parent().map(|p| p.to_path_buf()));
+    for (id, folder, files) in &state.locations {
+        let label = base.as_deref().and_then(|b| ss::relative_path(b, std::path::Path::new(folder))).unwrap_or_else(|| folder.clone());
+        rows.push(plain_row(
+            0,
+            crate::ui::icons::FOLDER_OPEN,
+            label,
+            None,
+            None,
+            vec![
+                mi("Add New Location...", Some(msg(SheetSetMsg::AddLocation))),
+                mi("Remove Location", Some(msg(SheetSetMsg::RemoveLocation(id.clone())))),
+            ],
+            None,
+        ));
+        for file in files {
+            let path = std::path::Path::new(folder).join(file).to_string_lossy().to_string();
+            let key = ss::path_key(&path);
+            let open = state.open_drawings.contains(&key);
+            rows.push(plain_row(
+                1,
+                crate::ui::icons::DOC,
+                file.clone(),
+                Some((open, msg(SheetSetMsg::ToggleDrawing(path.clone())))),
+                Some(msg(SheetSetMsg::OpenDrawing(path.clone()))),
+                vec![
+                    mi("Open", Some(msg(SheetSetMsg::OpenDrawing(path.clone())))),
+                    mi("", None),
+                    mi("Place on Sheet", Some(msg(SheetSetMsg::PlaceOnSheet(path.clone(), None)))),
+                    mi("See Model Space Views", Some(msg(SheetSetMsg::SeeViews(path.clone())))),
+                ],
+                None,
+            ));
+            if open {
+                for v in state.model_views.get(&key).cloned().unwrap_or_default() {
+                    rows.push(plain_row(
+                        2,
+                        crate::ui::icons::DOC,
+                        v.clone(),
+                        None,
+                        None,
+                        vec![
+                            mi("Open", Some(msg(SheetSetMsg::OpenDrawing(path.clone())))),
+                            mi("", None),
+                            mi("Place on Sheet", Some(msg(SheetSetMsg::PlaceOnSheet(path.clone(), Some(v))))),
+                        ],
+                        None,
+                    ));
+                }
+            }
+        }
+    }
+    rows.push(
+        button(text(format!("+ {}", t!("Add New Location..."))).size(12).style(muted_style))
+            .on_press(msg(SheetSetMsg::AddLocation))
+            .style(button::text)
+            .padding([3, 6])
+            .into(),
+    );
+    rows
+}
+
+fn heading(label: &str) -> Element<'static, Message> {
+    text(t!(label).into_owned())
+        .size(11)
+        .font(iced::Font { weight: iced::font::Weight::Bold, ..iced::Font::DEFAULT })
+        .style(|theme: &Theme| text::Style { color: Some(theme.palette().primary.base.color) })
+        .width(Fill)
+        .into()
+}
+
+pub fn view<'a>(state: &'a SheetSetManager, width: f32, auto_collapse: bool) -> Element<'a, Message> {
+    let title_bar =
+        crate::ui::dock::title_bar(PanelId::SheetSetManager, t!("Sheet Set Manager").into_owned(), auto_collapse);
+    let mut picks: Vec<Pick> =
+        state.sets.iter().enumerate().map(|(i, db)| Pick(Some(i), db.name().to_string())).collect();
+    picks.push(Pick(None, t!("Open...").into_owned()));
+    let current = state.current.and_then(|i| picks.get(i).cloned());
+    let combo = pick_list(current, picks, |p: &Pick| p.1.clone())
+        .placeholder(t!("Open...").into_owned())
+        .on_select(|p: Pick| msg(SheetSetMsg::PickSet(p.0)))
+        .text_size(12)
+        .padding([5, 8])
+        .width(Fill);
+    let tab = |label: &str, t: SsmTab| {
+        button(text(t!(label).into_owned()).size(11).center().width(Fill))
+            .on_press(msg(SheetSetMsg::Tab(t)))
+            .style(button_style(state.tab == t))
+            .padding([5, 4])
+            .width(Fill)
+    };
+    let tabs = row![
+        tab("Sheet List", SsmTab::SheetList),
+        tab("Sheet Views", SsmTab::SheetViews),
+        tab("Model Views", SsmTab::ModelViews),
+    ]
+    .spacing(2);
+
+    let body: Element<'a, Message> = match (state.db(), state.tab) {
+        (None, _) => text(t!("Open a sheet set or create one with NEWSHEETSET.").into_owned())
+            .size(12)
+            .style(muted_style)
+            .into(),
+        (Some(db), SsmTab::SheetList) => {
+            let set = db.sheet_set();
+            let open = !state.collapsed.contains(set.id());
+            let mut rows = vec![tree_row(state, set, 0, SET_ICON, db.name().to_string(), Some(open))];
+            if open {
+                push_tree(state, set, 1, &mut rows);
+            }
+            let header = row![
+                heading("Sheets"),
+                button(crate::ui::icons::themed(crate::ui::icons::REFRESH, 13.0))
+                    .on_press(msg(SheetSetMsg::Refresh))
+                    .style(button::subtle)
+                    .padding([2, 4]),
+            ]
+            .align_y(iced::Center);
+            column![header, scrollable(iced::widget::Column::with_children(rows).spacing(1)).height(Fill)]
+                .spacing(6)
+                .into()
+        }
+        (Some(db), SsmTab::SheetViews) => {
+            let by = state.by_category;
+            let header = row![
+                heading(if by { "View by category" } else { "View by sheet" }),
+                button(
+                    row![
+                        text(t!(if by { "View by sheet" } else { "View by category" }).into_owned()).size(11),
+                        crate::ui::icons::themed(crate::ui::icons::SWAP, 11.0),
+                    ]
+                    .spacing(4)
+                    .align_y(iced::Center),
+                )
+                .on_press(msg(SheetSetMsg::ViewsByCategory(!by)))
+                    .style(button::subtle)
+                    .padding([2, 4]),
+                button(crate::ui::icons::semantic(crate::ui::icons::PLUS, 12.0))
+                    .on_press(msg(SheetSetMsg::NewCategory))
+                    .style(button::subtle)
+                    .padding([2, 4]),
+            ]
+            .spacing(4)
+            .align_y(iced::Center);
+            column![header, scrollable(iced::widget::Column::with_children(sheet_views_rows(state, db)).spacing(1)).height(Fill)]
+                .spacing(6)
+                .into()
+        }
+        (Some(_), SsmTab::ModelViews) => {
+            let header = row![
+                heading("Locations"),
+                button(crate::ui::icons::themed(crate::ui::icons::REFRESH, 13.0))
+                    .on_press(msg(SheetSetMsg::Refresh))
+                    .style(button::subtle)
+                    .padding([2, 4]),
+                button(crate::ui::icons::semantic(crate::ui::icons::PLUS, 12.0))
+                    .on_press(msg(SheetSetMsg::AddLocation))
+                    .style(button::subtle)
+                    .padding([2, 4]),
+            ]
+            .spacing(4)
+            .align_y(iced::Center);
+            column![header, scrollable(iced::widget::Column::with_children(model_views_rows(state)).spacing(1)).height(Fill)]
+                .spacing(6)
+                .into()
+        }
+    };
+    let card = container(body).padding(6).width(Fill).height(Fill).style(|theme: &Theme| container::Style {
+        background: Some(Background::Color(theme.palette().background.weak.color)),
+        border: Border { radius: 4.0.into(), ..Default::default() },
+        ..Default::default()
+    });
+    let hint = text(t!("Double-click opens a sheet. Right-click for more commands.").into_owned())
+        .size(10)
+        .style(muted_style);
+    crate::ui::dock::frame(column![title_bar, combo, tabs, card, hint].spacing(6), width)
+}
+
+// ── dialogs ──────────────────────────────────────────────────────────────────
+
+fn card<'a>(title: &str, content: impl Into<Element<'a, Message>>) -> Element<'a, Message> {
+    container(column![text(t!(title).to_uppercase()).size(10).style(accent_text), content.into()].spacing(8))
+        .padding([10, 12])
+        .width(Fill)
+        .style(card_style)
+        .into()
+}
+
+fn input<'a>(value: &str, field: FieldId) -> Element<'a, Message> {
+    text_input("", value)
+        .size(12)
+        .padding([5, 8])
+        .style(field_style)
+        .on_input(move |v| msg(SheetSetMsg::Input(field, v)))
+        .into()
+}
+
+fn labeled<'a>(label: &str, control: impl Into<Element<'a, Message>>) -> Element<'a, Message> {
+    row![text(t!(label).into_owned()).size(12).width(Length::Fixed(170.0)), control.into()]
+        .spacing(8)
+        .align_y(iced::Center)
+        .into()
+}
+
+fn browse<'a>(m: SheetSetMsg) -> Element<'a, Message> {
+    button(text("...").size(12)).on_press(msg(m)).style(button_style(false)).padding([5, 10]).into()
+}
+
+fn error_band<'a>(error: &Option<String>) -> Option<Element<'a, Message>> {
+    error.as_ref().map(|e| {
+        container(text(e.clone()).size(12))
+            .padding([6, 10])
+            .width(Fill)
+            .style(|theme: &Theme| container::Style {
+                background: Some(Background::Color(theme.palette().danger.weak.color)),
+                text_color: Some(theme.palette().danger.weak.text),
+                border: Border { radius: 4.0.into(), ..Default::default() },
+                ..Default::default()
+            })
+            .into()
+    })
+}
+
+fn footer<'a>(left: Vec<Element<'a, Message>>, right: Vec<Element<'a, Message>>) -> Element<'a, Message> {
+    let mut r = row![button(text("?").size(12)).on_press(msg(SheetSetMsg::Help)).style(button_style(false)).padding([5, 11])]
+        .spacing(6)
+        .align_y(iced::Center);
+    for e in left {
+        r = r.push(e);
+    }
+    r = r.push(Space::new().width(Fill));
+    for e in right {
+        r = r.push(e);
+    }
+    r.into()
+}
+
+fn wizard_view<'a>(w: &'a Wizard) -> Element<'a, Message> {
+    let steps: Vec<(u8, &str)> = if w.existing {
+        vec![(0, "Begin"), (1, "Details"), (2, "Choose Layouts"), (3, "Confirm")]
+    } else {
+        vec![(0, "Begin"), (1, "Details"), (3, "Confirm")]
+    };
+    let chips = iced::widget::Row::with_children(steps.iter().enumerate().map(|(n, (s, label))| {
+        button(text(format!("{} {}", n + 1, t!(*label))).size(12))
+            .on_press(msg(SheetSetMsg::Wizard(WizardMsg::Step(*s))))
+            .style(button_style(w.step == *s))
+            .padding([4, 10])
+            .into()
+    }))
+    .spacing(6);
+    let page: Element<'a, Message> = match w.step {
+        0 => card(
+            "Create a sheet set using",
+            column![
+                checkbox(!w.existing)
+                    .label(t!("An empty sheet set").into_owned())
+                    .text_size(12)
+                    .size(14)
+                    .on_toggle(|_| msg(SheetSetMsg::Wizard(WizardMsg::Existing(false)))),
+                checkbox(w.existing)
+                    .label(t!("Existing drawings").into_owned())
+                    .text_size(12)
+                    .size(14)
+                    .on_toggle(|_| msg(SheetSetMsg::Wizard(WizardMsg::Existing(true)))),
+                text(
+                    t!(if w.existing {
+                        "Lets you specify one or more folders containing drawings. The layouts from these drawings can be automatically imported into the sheet set."
+                    } else {
+                        "Creates a sheet set with no subsets or sheets."
+                    })
+                    .into_owned()
+                )
+                .size(11)
+                .style(muted_style),
+            ]
+            .spacing(8),
+        ),
+        1 => card(
+            "Sheet Set",
+            column![
+                labeled("Name of new sheet set:", input(&w.name, FieldId::Name)),
+                labeled("Description (optional):", input(&w.description, FieldId::Description)),
+                labeled(
+                    "Store sheet set data file (.dst) here:",
+                    row![input(&w.folder, FieldId::Folder), browse(SheetSetMsg::Browse(FieldId::Folder))].spacing(6)
+                ),
+                checkbox(w.hierarchy)
+                    .label(t!("Create a folder hierarchy based on subsets").into_owned())
+                    .text_size(12)
+                    .size(14)
+                    .on_toggle(|v| msg(SheetSetMsg::Toggle(FieldId::Hierarchy, v))),
+                row![
+                    Space::new().width(Fill),
+                    button(text(t!("Sheet Set Properties...").into_owned()).size(12))
+                        .on_press(msg(SheetSetMsg::WizardProperties))
+                        .style(button_style(false))
+                        .padding([5, 12]),
+                ],
+            ]
+            .spacing(8),
+        ),
+        2 => {
+            let rows = w.layouts.iter().enumerate().map(|(i, l)| {
+                checkbox(l.on)
+                    .label(format!("{} — {}", l.file, l.layout))
+                    .text_size(12)
+                    .size(14)
+                    .on_toggle(move |v| msg(SheetSetMsg::Wizard(WizardMsg::LayoutOn(i, v))))
+                    .into()
+            });
+            let folders = w.folders.iter().enumerate().map(|(i, f)| {
+                row![
+                    text(f.clone()).size(12).width(Fill),
+                    button(crate::ui::icons::themed_secondary(crate::ui::icons::CLOSE, 12.0))
+                        .on_press(msg(SheetSetMsg::Wizard(WizardMsg::RemoveFolder(i))))
+                        .style(button::text)
+                        .padding([0, 6]),
+                ]
+                .into()
+            });
+            card(
+                "Choose Layouts",
+                column![
+                    row![
+                        text(t!("Select folders containing drawings. Layouts in the drawings can be added to the sheet set.").into_owned())
+                            .size(11)
+                            .style(muted_style)
+                            .width(Fill),
+                        button(text(t!("Browse...").into_owned()).size(12))
+                            .on_press(msg(SheetSetMsg::Browse(FieldId::AddFolder)))
+                            .style(button_style(false))
+                            .padding([5, 12]),
+                    ]
+                    .spacing(8)
+                    .align_y(iced::Center),
+                    iced::widget::Column::with_children(folders.collect::<Vec<_>>()).spacing(2),
+                    container(scrollable(iced::widget::Column::with_children(rows.collect::<Vec<_>>()).spacing(3)))
+                        .height(Length::Fixed(180.0)),
+                ]
+                .spacing(8),
+            )
+        }
+        _ => {
+            let mut lines = vec![
+                format!("{}: {}", t!("Sheet Set"), w.name),
+                format!("{}: {}", t!("Sheet set data file"), wizard_dst_path(w)),
+                format!("{}: {}", t!("Description"), w.description),
+            ];
+            if w.existing {
+                let n = w.layouts.iter().filter(|l| l.on).count();
+                lines.push(format!("{}: {n}", t!("Sheets to import")));
+            }
+            for (name, value, _) in ss::custom_properties(w.draft.sheet_set()) {
+                lines.push(format!("{name}: {value}"));
+            }
+            card(
+                "Confirm",
+                iced::widget::Column::with_children(lines.into_iter().map(|l| text(l).size(12).into())).spacing(4),
+            )
+        }
+    };
+    let next_step = match (w.step, w.existing) {
+        (0, _) => Some(1),
+        (1, true) => Some(2),
+        (1, false) | (2, _) => Some(3),
+        _ => None,
+    };
+    let back_step = match (w.step, w.existing) {
+        (3, true) => Some(2),
+        (3, false) | (2, _) => Some(1),
+        (1, _) => Some(0),
+        _ => None,
+    };
+    let back = button(text(t!("Back").into_owned()).size(12))
+        .on_press_maybe(back_step.map(|s| msg(SheetSetMsg::Wizard(WizardMsg::Step(s)))))
+        .style(button_style(false))
+        .padding([6, 14]);
+    let next: Element<'a, Message> = match next_step {
+        Some(s) => button(text(t!("Next").into_owned()).size(12))
+            .on_press(msg(SheetSetMsg::Wizard(WizardMsg::Step(s))))
+            .style(button_style(true))
+            .padding([6, 14])
+            .into(),
+        None => dialog_button(t!("Finish"), msg(SheetSetMsg::Ok), true).into(),
+    };
+    let mut col = column![chips, page].spacing(10);
+    if let Some(e) = error_band(&w.error) {
+        col = col.push(e);
+    }
+    col.push(footer(vec![], vec![back.into(), next, dialog_button(t!("Cancel"), msg(SheetSetMsg::Cancel), false).into()]))
+        .into()
+}
+
+/// Where the wizard writes the `.dst`.
+pub fn wizard_dst_path(w: &Wizard) -> String {
+    ss::native_path(&std::path::Path::new(&w.folder).join(format!("{}.dst", w.name.trim())).to_string_lossy())
+}
+
+fn properties_view<'a>(p: &'a Properties) -> Element<'a, Message> {
+    let mut groups: Vec<Element<'a, Message>> = Vec::new();
+    let mut current: Option<&'static str> = None;
+    let mut rows: Vec<Element<'a, Message>> = Vec::new();
+    let flush = |group: Option<&'static str>, rows: &mut Vec<Element<'a, Message>>, groups: &mut Vec<Element<'a, Message>>| {
+        if let Some(g) = group {
+            groups.push(card(g, iced::widget::Column::with_children(std::mem::take(rows)).spacing(6)));
+        }
+    };
+    for (i, r) in p.rows.iter().enumerate() {
+        if current != Some(r.group) {
+            flush(current, &mut rows, &mut groups);
+            current = Some(r.group);
+        }
+        let control: Element<'a, Message> = match r.key {
+            RowKey::ReadOnly => container(text(r.value.clone()).size(12).style(muted_style))
+                .padding([5, 8])
+                .width(Fill)
+                .into(),
+            RowKey::Folder(_) => row![input(&r.value, FieldId::Row(i)), browse(SheetSetMsg::Browse(FieldId::Row(i)))]
+                .spacing(6)
+                .into(),
+            RowKey::Template => row![
+                container(text(r.value.clone()).size(12)).padding([5, 8]).width(Fill),
+                browse(SheetSetMsg::BrowseTemplate)
+            ]
+            .spacing(6)
+            .align_y(iced::Center)
+            .into(),
+            RowKey::PromptTemplate => {
+                let yes = r.value == "Yes";
+                let opts = vec![t!("Yes").into_owned(), t!("No").into_owned()];
+                pick_list(Some(opts[if yes { 0 } else { 1 }].clone()), opts.clone(), |s: &String| s.clone())
+                    .on_select(move |s: String| msg(SheetSetMsg::Choose(FieldId::Row(i), usize::from(s != t!("Yes")))))
+                    .text_size(12)
+                    .padding([5, 8])
+                    .width(Fill)
+                    .into()
+            }
+            RowKey::Publish => yes_no(
+                r.value != "Do Not Publish Sheets",
+                FieldId::Row(i),
+                "Publish by Sheet 'Include for Publish' Setting",
+                "Do Not Publish Sheets",
+            ),
+            RowKey::Prop(_) => input(&r.value, FieldId::Row(i)),
+        };
+        rows.push(labeled(r.label, control));
+    }
+    flush(current, &mut rows, &mut groups);
+    if p.kind != ComponentKind::Subset {
+        let owner = |f: i32| if f & ss::CUSTOM_SHEET_PROP != 0 { t!("Sheet") } else { t!("Sheet Set") };
+        let mut custom: Vec<Element<'a, Message>> = p
+            .custom
+            .iter()
+            .enumerate()
+            .map(|(i, (name, value, flags))| {
+                let label = if p.kind == ComponentKind::SheetSet { format!("{name} ({})", owner(*flags)) } else { name.clone() };
+                row![
+                    text(label).size(12).width(Length::Fixed(170.0)),
+                    text_input("", value)
+                        .size(12)
+                        .padding([5, 8])
+                        .style(field_style)
+                        .on_input(move |v| msg(SheetSetMsg::CustomValue(i, v))),
+                ]
+                .spacing(8)
+                .align_y(iced::Center)
+                .into()
+            })
+            .collect();
+        if p.kind == ComponentKind::SheetSet {
+            match &p.adding {
+                Some((name, value, sheet)) => custom.push(
+                    container(
+                        column![
+                            labeled("Name:", input(name, FieldId::CustomName)),
+                            labeled("Default value:", input(value, FieldId::CustomDefault)),
+                            labeled(
+                                "Owner",
+                                row![
+                                    checkbox(!*sheet)
+                                        .label(t!("Sheet Set").into_owned())
+                                        .text_size(12)
+                                        .size(14)
+                                        .on_toggle(|_| msg(SheetSetMsg::Choose(FieldId::CustomOwner, 0))),
+                                    checkbox(*sheet)
+                                        .label(t!("Sheet").into_owned())
+                                        .text_size(12)
+                                        .size(14)
+                                        .on_toggle(|_| msg(SheetSetMsg::Choose(FieldId::CustomOwner, 1))),
+                                ]
+                                .spacing(12)
+                            ),
+                            row![
+                                Space::new().width(Fill),
+                                dialog_button(t!("Cancel"), msg(SheetSetMsg::AddCustomCancel), false),
+                                dialog_button(t!("OK"), msg(SheetSetMsg::AddCustomOk), true),
+                            ]
+                            .spacing(6),
+                        ]
+                        .spacing(6),
+                    )
+                    .padding(8)
+                    .style(|theme: &Theme| container::Style {
+                        border: Border { color: theme.palette().background.neutral.color, width: 1.0, radius: 4.0.into() },
+                        ..Default::default()
+                    })
+                    .into(),
+                ),
+                None => custom.push(
+                    row![
+                        Space::new().width(Fill),
+                        button(text(t!("Add Custom Property...").into_owned()).size(12))
+                            .on_press(msg(SheetSetMsg::AddCustom))
+                            .style(button_style(false))
+                            .padding([5, 12]),
+                    ]
+                    .into(),
+                ),
+            }
+        }
+        groups.push(card("Custom Properties", iced::widget::Column::with_children(custom).spacing(6)));
+    }
+    let mut col = column![scrollable(iced::widget::Column::with_children(groups).spacing(10)).height(Fill)].spacing(10);
+    if let Some(e) = error_band(&p.error) {
+        col = col.push(e);
+    }
+    col.push(footer(
+        vec![],
+        vec![
+            dialog_button(t!("Cancel"), msg(SheetSetMsg::Cancel), false).into(),
+            dialog_button(t!("OK"), msg(SheetSetMsg::Ok), true).into(),
+        ],
+    ))
+    .into()
+}
+
+fn check<'a>(on: bool, label: &str, field: FieldId, enabled: bool) -> Element<'a, Message> {
+    let c = checkbox(on).label(t!(label).into_owned()).text_size(12).size(14);
+    if enabled {
+        c.on_toggle(move |v| msg(SheetSetMsg::Toggle(field, v))).into()
+    } else {
+        c.into()
+    }
+}
+
+fn read_only<'a>(value: &str) -> Element<'a, Message> {
+    container(text(value.to_string()).size(12).style(muted_style)).padding([5, 8]).width(Fill).into()
+}
+
+fn ok_cancel<'a>(ok: &str) -> Element<'a, Message> {
+    footer(
+        vec![],
+        vec![
+            dialog_button(t!("Cancel"), msg(SheetSetMsg::Cancel), false).into(),
+            dialog_button(t!(ok), msg(SheetSetMsg::Ok), true).into(),
+        ],
+    )
+}
+
+fn yes_no<'a>(yes: bool, field: FieldId, a: &str, b: &str) -> Element<'a, Message> {
+    let opts = vec![t!(a).into_owned(), t!(b).into_owned()];
+    let first = opts[0].clone();
+    pick_list(Some(opts[if yes { 0 } else { 1 }].clone()), opts, |s: &String| s.clone())
+        .on_select(move |s: String| msg(SheetSetMsg::Toggle(field, s == first)))
+        .text_size(12)
+        .padding([5, 8])
+        .width(Fill)
+        .into()
+}
+
+fn form_view<'a>(f: &'a Form) -> Element<'a, Message> {
+    let number_title = row![
+        text(t!("Number").into_owned()).size(12).width(Length::Fixed(96.0)),
+        container(input(&f.number, FieldId::Number)).width(Length::Fixed(110.0)),
+        text(t!("Sheet title").into_owned()).size(12),
+        input(&f.title, FieldId::Title),
+    ]
+    .spacing(8)
+    .align_y(iced::Center);
+    let short = |label: &str, control: Element<'a, Message>| -> Element<'a, Message> {
+        row![text(t!(label).into_owned()).size(12).width(Length::Fixed(96.0)), control].spacing(8).align_y(iced::Center).into()
+    };
+    let cards: Vec<Element<'a, Message>> = match f.kind {
+        FormKind::NewSheet => vec![card(
+            "Sheet",
+            column![
+                number_title,
+                short("File name", input(&f.file_name, FieldId::FileName)),
+                short("Folder path", read_only(&f.folder)),
+                short("Sheet template", read_only(&f.drawing)),
+                row![Space::new().width(Length::Fixed(104.0)), check(f.open_after, "Open in drawing editor", FieldId::OpenAfter, true)],
+            ]
+            .spacing(8),
+        )],
+        FormKind::NewSubset => vec![card(
+            "Subset",
+            column![
+                labeled("Subset name", input(&f.title, FieldId::Title)),
+                labeled("Create folder hierarchy", yes_no(f.hierarchy, FieldId::Hierarchy, "Yes", "No")),
+                labeled(
+                    "Publish sheets in subset",
+                    yes_no(f.publish, FieldId::Publish, "Publish by Sheet 'Include for Publish' Setting", "Do Not Publish Sheets")
+                ),
+                labeled(
+                    "New sheet location",
+                    if f.hierarchy {
+                        read_only(&f.folder)
+                    } else {
+                        row![input(&f.folder, FieldId::Folder), browse(SheetSetMsg::Browse(FieldId::Folder))].spacing(6).into()
+                    }
+                ),
+            ]
+            .spacing(8),
+        )],
+        FormKind::Rename => {
+            let layout: Element<'a, Message> = if f.rename[0] { read_only(&f.layout_name) } else { input(&f.layout_name, FieldId::LayoutName) };
+            let file: Element<'a, Message> = if f.rename[2] { read_only(&f.file_name) } else { input(&f.file_name, FieldId::FileName) };
+            vec![
+                card(
+                    "Sheet",
+                    column![number_title, short("Layout name", layout), short("File name", file), short("Folder path", read_only(&f.folder))]
+                        .spacing(8),
+                ),
+                card(
+                    "Rename options",
+                    row![
+                        column![
+                            text(t!("Rename layout to match:").into_owned()).size(12),
+                            check(f.rename[0], "Sheet title", FieldId::RenameOption(0), true),
+                            row![Space::new().width(22), check(f.rename[1], "Prefix with sheet number", FieldId::RenameOption(1), f.rename[0])],
+                        ]
+                        .spacing(6)
+                        .width(Fill),
+                        column![
+                            text(t!("Rename drawing file to match:").into_owned()).size(12),
+                            check(f.rename[2], "Sheet title", FieldId::RenameOption(2), true),
+                            row![Space::new().width(22), check(f.rename[3], "Prefix with sheet number", FieldId::RenameOption(3), f.rename[2])],
+                        ]
+                        .spacing(6)
+                        .width(Fill),
+                    ]
+                    .spacing(16),
+                ),
+            ]
+        }
+        FormKind::RenameView => vec![card(
+            "View",
+            row![
+                text(t!("Number").into_owned()).size(12).width(Length::Fixed(70.0)),
+                container(input(&f.number, FieldId::Number)).width(Length::Fixed(90.0)),
+                text(t!("View title").into_owned()).size(12),
+                input(&f.title, FieldId::Title),
+            ]
+            .spacing(8)
+            .align_y(iced::Center),
+        )],
+        FormKind::ImportLayout => {
+            let head = row![
+                Space::new().width(22),
+                text(t!("Layout name").into_owned()).size(11).width(Fill),
+                text(t!("Drawing").into_owned()).size(11).width(Fill),
+                text(t!("Status").into_owned()).size(11).width(Fill),
+            ]
+            .spacing(6);
+            let mut list = vec![head.into()];
+            for (k, r) in f.rows.iter().enumerate() {
+                let file = std::path::Path::new(&r.drawing).file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_default();
+                let (label, warn) = if r.taken {
+                    ("This layout is already part of a sheet set - not available for import.", true)
+                } else if r.warn {
+                    ("Warning: this layout may belong to another sheet set.", true)
+                } else {
+                    ("Available for import", false)
+                };
+                let status: Element<'a, Message> = text(t!(label).into_owned())
+                    .size(12)
+                    .style(move |t: &Theme| text::Style {
+                        color: Some(if warn { t.palette().warning.base.color } else { t.palette().success.base.color }),
+                    })
+                    .into();
+                let enabled = !r.taken;
+                let cb = checkbox(r.on).size(14);
+                let cb: Element<'a, Message> = if enabled { cb.on_toggle(move |v| msg(SheetSetMsg::Toggle(FieldId::ImportRow(k), v))).into() } else { cb.into() };
+                let name = text(r.layout.clone()).size(12).width(Fill);
+                let file = text(file).size(12).width(Fill);
+                list.push(
+                    row![cb, if enabled { name } else { name.style(muted_style) }, if enabled { file } else { file.style(muted_style) }, container(status).width(Fill)]
+                        .spacing(6)
+                        .align_y(iced::Center)
+                        .into(),
+                );
+            }
+            vec![card(
+                "Drawings",
+                column![
+                    row![
+                        text(t!("Select drawing files containing layouts").into_owned()).size(12).width(Fill),
+                        button(text(t!("Browse for Drawings...").into_owned()).size(12))
+                            .on_press(msg(SheetSetMsg::BrowseDrawings))
+                            .style(button_style(false))
+                            .padding([5, 12]),
+                    ]
+                    .align_y(iced::Center),
+                    text(t!("A layout can belong to only one sheet set. If a layout already belongs to a sheet set, you must create a copy of the layout to import it.").into_owned())
+                        .size(11)
+                        .style(muted_style),
+                    container(scrollable(iced::widget::Column::with_children(list).spacing(4)))
+                        .padding(6)
+                        .height(Length::Fixed(150.0))
+                        .style(card_style),
+                    check(f.prefix, "Prefix sheet titles with file name", FieldId::ImportPrefix, true),
+                ]
+                .spacing(8),
+            )]
+        }
+    };
+    let mut col = iced::widget::Column::with_children(cards).spacing(10);
+    if let Some(e) = error_band(&f.error) {
+        col = col.push(e);
+    }
+    let foot = match f.kind {
+        FormKind::Rename | FormKind::RenameView => footer(
+            vec![
+                button(text(t!("Previous").into_owned()).size(12))
+                    .on_press(msg(SheetSetMsg::Previous))
+                    .style(button_style(false))
+                    .padding([5, 12])
+                    .into(),
+                button(text(t!("Next").into_owned()).size(12))
+                    .on_press(msg(SheetSetMsg::Next))
+                    .style(button_style(false))
+                    .padding([5, 12])
+                    .into(),
+            ],
+            vec![
+                dialog_button(t!("Cancel"), msg(SheetSetMsg::Cancel), false).into(),
+                dialog_button(t!("OK"), msg(SheetSetMsg::Ok), true).into(),
+            ],
+        ),
+        FormKind::ImportLayout => ok_cancel("Import Checked"),
+        _ => ok_cancel("OK"),
+    };
+    col.push(foot).into()
+}
+
+fn template_view<'a>(t: &'a TemplatePick) -> Element<'a, Message> {
+    let rows = t.layouts.iter().enumerate().map(|(i, name)| {
+        button(text(name.clone()).size(12))
+            .on_press(msg(SheetSetMsg::Choose(FieldId::Layout, i)))
+            .style(button_style(t.layout == i))
+            .padding([3, 8])
+            .width(Fill)
+            .into()
+    });
+    column![
+        card(
+            "Template",
+            column![
+                text(t!("Drawing template file name").into_owned()).size(12),
+                row![read_only(&t.file), browse(SheetSetMsg::BrowseTemplate)].spacing(6).align_y(iced::Center),
+                text(t!("Select a layout to create new sheets").into_owned()).size(12),
+                container(scrollable(iced::widget::Column::with_children(rows.collect::<Vec<_>>()).spacing(1)))
+                    .padding(4)
+                    .height(Length::Fixed(130.0))
+                    .style(card_style),
+            ]
+            .spacing(8)
+        ),
+        ok_cancel("OK"),
+    ]
+    .spacing(10)
+    .into()
+}
+
+fn category_view<'a>(c: &'a Category) -> Element<'a, Message> {
+    let blocks = c.blocks.iter().enumerate().map(|(i, (_, label, on))| check(*on, label, FieldId::CategoryBlock(i), true));
+    let mut col = column![card(
+        "Category",
+        column![
+            labeled("Category name", input(&c.name, FieldId::Name)),
+            text(t!("Select the callout blocks to be used in this category").into_owned()).size(12),
+            container(scrollable(iced::widget::Column::with_children(blocks.collect::<Vec<_>>()).spacing(4)))
+                .padding(6)
+                .height(Length::Fixed(90.0))
+                .width(Fill)
+                .style(card_style),
+            text(t!("Selected blocks will be available for selection when you insert a callout block from the view tab.").into_owned())
+                .size(11)
+                .style(muted_style),
+            button(text(t!("Add Blocks...").into_owned()).size(12))
+                .on_press(msg(SheetSetMsg::AddBlocks))
+                .style(button_style(false))
+                .padding([5, 12]),
+        ]
+        .spacing(8)
+    )]
+    .spacing(10);
+    if let Some(e) = error_band(&c.error) {
+        col = col.push(e);
+    }
+    col.push(ok_cancel("OK")).into()
+}
+
+/// A block preview (the Blocks palette's), or the empty preview box.
+fn preview_box<'a>(previews: &'a std::collections::HashMap<String, Vec<crate::scene::model::wire_model::WireModel>>, key: Option<&String>, height: f32) -> Element<'a, Message> {
+    let inner: Element<'a, Message> = match key.and_then(|k| previews.get(k)) {
+        Some(w) if !w.is_empty() => crate::ui::window::block_palette::preview_canvas(w, height - 8.0),
+        _ => text(t!("preview").into_owned()).size(11).style(muted_style).into(),
+    };
+    container(inner).center_x(Fill).center_y(Length::Fixed(height)).padding(4).style(card_style).into()
+}
+
+fn block_list_view<'a>(b: &'a BlockList, state: &'a SheetSetManager) -> Element<'a, Message> {
+    let rows = b.blocks.iter().enumerate().map(|(i, (_, label))| {
+        button(text(label.clone()).size(12))
+            .on_press(msg(SheetSetMsg::BlockListSelect(i)))
+            .style(button_style(b.selected == Some(i)))
+            .padding([3, 8])
+            .width(Fill)
+            .into()
+    });
+    let side = column![
+        button(text(t!("Add...").into_owned()).size(12).center().width(Fill))
+            .on_press(msg(SheetSetMsg::BlockListAdd))
+            .style(button_style(false))
+            .padding([5, 12])
+            .width(Fill),
+        button(text(t!("Delete").into_owned()).size(12).center().width(Fill))
+            .on_press_maybe(b.selected.map(|_| msg(SheetSetMsg::BlockListDelete)))
+            .style(button_style(false))
+            .padding([5, 12])
+            .width(Fill),
+        preview_box(&state.previews, b.preview.as_ref(), 84.0),
+    ]
+    .spacing(6)
+    .width(Length::Fixed(130.0));
+    column![
+        card(
+            "Blocks",
+            column![
+                text(t!("The following blocks are associated with this sheet set:").into_owned()).size(12),
+                row![
+                    container(scrollable(iced::widget::Column::with_children(rows.collect::<Vec<_>>()).spacing(1)))
+                        .padding(4)
+                        .height(Length::Fixed(150.0))
+                        .width(Fill)
+                        .style(card_style),
+                    side,
+                ]
+                .spacing(10)
+                .height(Length::Fixed(150.0)),
+            ]
+            .spacing(8)
+        ),
+        ok_cancel("OK"),
+    ]
+    .spacing(10)
+    .into()
+}
+
+fn select_block_view<'a>(b: &'a SelectBlock, state: &'a SheetSetManager) -> Element<'a, Message> {
+    let names = b.names.iter().enumerate().map(|(i, (name, _, on))| {
+        let c = checkbox(*on).label(name.clone()).text_size(12).size(14);
+        if b.whole { c.into() } else { c.on_toggle(move |v| msg(SheetSetMsg::SelectBlockCheck(i, v))).into() }
+    });
+    let radio = |on: bool, label: &str, whole: bool| {
+        checkbox(on).label(t!(label).into_owned()).text_size(12).size(14).on_toggle(move |_| msg(SheetSetMsg::SelectBlockWhole(whole)))
+    };
+    let mut col = column![card(
+        "Drawing",
+        column![
+            text(t!("Enter the drawing file name:").into_owned()).size(12),
+            row![read_only(&b.file), browse(SheetSetMsg::SelectBlockBrowse)].spacing(6).align_y(iced::Center),
+            radio(b.whole, "Select the drawing file as a block", true),
+            radio(!b.whole, "Choose blocks in the drawing file:", false),
+            row![
+                Space::new().width(22),
+                container(scrollable(iced::widget::Column::with_children(names.collect::<Vec<_>>()).spacing(4)))
+                    .padding(6)
+                    .height(Length::Fixed(110.0))
+                    .width(Fill)
+                    .style(card_style),
+                container(preview_box(&state.previews, b.preview.as_ref(), 110.0)).width(Length::Fixed(130.0)),
+            ]
+            .spacing(10),
+        ]
+        .spacing(8)
+    )]
+    .spacing(10);
+    if let Some(e) = error_band(&b.error) {
+        col = col.push(e);
+    }
+    col.push(ok_cancel("OK")).into()
+}
+
+fn confirm_view<'a>(question: &'a str) -> Element<'a, Message> {
+    column![
+        row![
+            text("?").size(22).style(accent_text),
+            column![
+                text(question.to_string()).size(12),
+                text(t!("(The layout and the drawing file will not be deleted.)").into_owned()).size(12).style(muted_style),
+            ]
+            .spacing(4),
+        ]
+        .spacing(14),
+        row![
+            Space::new().width(Fill),
+            dialog_button(t!("Cancel"), msg(SheetSetMsg::Cancel), false),
+            dialog_button(t!("Remove"), msg(SheetSetMsg::Ok), true),
+        ]
+        .spacing(6),
+    ]
+    .spacing(14)
+    .into()
+}
+
+pub fn dialog_view<'a>(state: &'a SheetSetManager, sizing: crate::ui::modal::ModalSizing) -> Element<'a, Message> {
+    let body = match state.dialog.as_ref() {
+        Some(SsDialog::Wizard(w)) => wizard_view(w),
+        Some(SsDialog::Properties(p)) => properties_view(p),
+        Some(SsDialog::Form(f)) => form_view(f),
+        Some(SsDialog::Confirm(_, _, q)) => confirm_view(q),
+        Some(SsDialog::Template(t)) => template_view(t),
+        Some(SsDialog::Category(c)) => category_view(c),
+        Some(SsDialog::BlockList(b)) => block_list_view(b, state),
+        Some(SsDialog::SelectBlock(b)) => select_block_view(b, state),
+        None => Space::new().into(),
+    };
+    container(body).padding([10, 12]).width(sizing.width).into()
+}