View cube edges are targets: hovering an edge lights a band along it on both faces it joins, and a click turns the view halfway between those faces (top-front looks down at 45°, front-right along the diagonal). The cube now has 26 targets (6 faces, 12 edges, 8 corner facets); its drawing is unchanged. Looking straight at a face, the four edges around it are bands along its border. Tests: every target's patches are hit where drawn, the patches cover the drawn cube from any direction, edges pick from an iso view and face-on, and the s39 scenario hovers and clicks edges

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/book/src/guide/ui-tour.md

@@ -15,8 +15,8 @@
 - **Viewport.** Click to select, Shift or Ctrl to add, drag for a window or crossing box. The
   wheel zooms at the cursor, the middle button pans and Shift+middle orbits (the mouse preset in
   Preferences switches to SolidWorks or Inventor style). The view cube and the navigation bar
-  change the view: a cube face turns to its standard view, a chamfered corner to that corner's
-  iso view, and the house goes home. Right-click for the marking menu: eight commands around the cursor, plus a
+  change the view: a cube face turns to its standard view, an edge to the view halfway between
+  its two faces, a chamfered corner to that corner's iso view, and the house goes home. Right-click for the marking menu: eight commands around the cursor, plus a
   menu for whatever is under it.
 - **Dialogs** dock on the right with a live preview. Most features also show drag handles and a
   value box in the viewport.