diff --git a/Cargo.lock b/Cargo.lock
index d9ae3e72e..017118f42 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -54,7 +54,7 @@ checksum = "366ffbaa4442f4684d91e2cd7c5ea7c4ed8add41959a31447066e279e432b618"
 [[package]]
 name = "acadrust"
 version = "0.3.4"
-source = "git+https://github.com/HakanSeven12/acadrust?branch=main#5b09ccc00d92bb55dcccbef97c0fcecf94417e16"
+source = "git+https://github.com/HakanSeven12/acadrust?branch=main#c117f98c3d33dc173e3ee01f39a7729d58bc0347"
 dependencies = [
  "ahash",
  "anyhow",
diff --git a/src/app/mod.rs b/src/app/mod.rs
index 9b8ffa22e..a477ebff6 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -305,6 +305,12 @@ pub(super) struct OpenCADStudio {
     textstyle_width: String,
     /// Edit buffer for oblique angle (degrees).
     textstyle_oblique: String,
+    /// Edit buffer for fixed text height (0 = variable).
+    textstyle_height: String,
+    /// Edit buffer for big-font file name.
+    textstyle_bigfont: String,
+    /// Edit buffer for TrueType font name.
+    textstyle_ttf: String,
 
     // ── Color Scheme ──────────────────────────────────────────────────────
     active_theme: Theme,
@@ -880,6 +886,9 @@ pub enum Message {
     TextStyleApply,
     /// Select a font from the built-in font list.
     TextStyleFontPick(String),
+    /// Flip a boolean flag on the selected text style (backward / upside_down /
+    /// vertical / annotative), applied immediately.
+    TextStyleToggle(&'static str),
     // ── TableStyle Dialog ─────────────────────────────────────────────────
     TableStyleDialogOpen,
     #[allow(dead_code)]
@@ -1053,6 +1062,9 @@ impl OpenCADStudio {
             textstyle_font: String::new(),
             textstyle_width: "1.0".to_string(),
             textstyle_oblique: "0.0".to_string(),
+            textstyle_height: "0.0".to_string(),
+            textstyle_bigfont: String::new(),
+            textstyle_ttf: String::new(),
             // TableStyle dialog
             tablestyle_selected: "Standard".to_string(),
             // MLineStyle dialog
diff --git a/src/app/update.rs b/src/app/update.rs
index a8365333d..b18738092 100644
--- a/src/app/update.rs
+++ b/src/app/update.rs
@@ -5634,10 +5634,31 @@ impl OpenCADStudio {
                     "font" => self.textstyle_font = value,
                     "width" => self.textstyle_width = value,
                     "oblique" => self.textstyle_oblique = value,
+                    "height" => self.textstyle_height = value,
+                    "bigfont" => self.textstyle_bigfont = value,
+                    "ttf" => self.textstyle_ttf = value,
                     _ => {}
                 }
                 Task::none()
             }
+            Message::TextStyleToggle(field) => {
+                let i = self.active_tab;
+                let name = self.textstyle_selected.clone();
+                if self.tabs[i].scene.document.text_styles.get(&name).is_some() {
+                    self.push_undo_snapshot(i, "STYLE EDIT");
+                    if let Some(s) = self.tabs[i].scene.document.text_styles.get_mut(&name) {
+                        match field {
+                            "backward" => s.flags.backward = !s.flags.backward,
+                            "upside_down" => s.flags.upside_down = !s.flags.upside_down,
+                            "annotative" => s.annotative = !s.annotative,
+                            _ => {}
+                        }
+                    }
+                    self.tabs[i].scene.bump_geometry();
+                    self.tabs[i].dirty = true;
+                }
+                Task::none()
+            }
             Message::TextStyleApply => {
                 let i = self.active_tab;
                 let name = self.textstyle_selected.clone();
@@ -5646,15 +5667,24 @@ impl OpenCADStudio {
                     let font = self.textstyle_font.clone();
                     let width_str = self.textstyle_width.clone();
                     let oblique_str = self.textstyle_oblique.clone();
+                    let height_str = self.textstyle_height.clone();
+                    let bigfont = self.textstyle_bigfont.clone();
+                    let ttf = self.textstyle_ttf.clone();
                     if let Some(s) = self.tabs[i].scene.document.text_styles.get_mut(&name) {
                         s.font_file = font;
+                        s.big_font_file = bigfont;
+                        s.true_type_font = ttf;
                         if let Ok(w) = width_str.trim().parse::<f64>() {
                             s.width_factor = w;
                         }
                         if let Ok(a) = oblique_str.trim().parse::<f64>() {
                             s.oblique_angle = a.to_radians();
                         }
+                        if let Ok(h) = height_str.trim().parse::<f64>() {
+                            s.height = h.max(0.0);
+                        }
                     }
+                    self.tabs[i].scene.bump_geometry();
                     self.tabs[i].dirty = true;
                 }
                 Task::none()
@@ -6635,6 +6665,9 @@ impl OpenCADStudio {
             self.textstyle_font = s.font_file.clone();
             self.textstyle_width = format!("{:.4}", s.width_factor);
             self.textstyle_oblique = format!("{:.2}", s.oblique_angle.to_degrees());
+            self.textstyle_height = format!("{:.4}", s.height);
+            self.textstyle_bigfont = s.big_font_file.clone();
+            self.textstyle_ttf = s.true_type_font.clone();
         }
     }
 }
diff --git a/src/app/view.rs b/src/app/view.rs
index 49a3ecf67..4077bddab 100644
--- a/src/app/view.rs
+++ b/src/app/view.rs
@@ -65,13 +65,26 @@ impl OpenCADStudio {
                 .iter()
                 .map(|s| s.name.clone())
                 .collect();
-            return crate::ui::textstyle::view_window(
+            let (backward, upside_down, annotative) = tab
+                .scene
+                .document
+                .text_styles
+                .get(&self.textstyle_selected)
+                .map(|s| (s.flags.backward, s.flags.upside_down, s.annotative))
+                .unwrap_or((false, false, false));
+            return crate::ui::textstyle::view_window(crate::ui::textstyle::TextStyleView {
                 styles,
-                &self.textstyle_selected,
-                &self.textstyle_font,
-                &self.textstyle_width,
-                &self.textstyle_oblique,
-            );
+                selected: &self.textstyle_selected,
+                font_buf: &self.textstyle_font,
+                width_buf: &self.textstyle_width,
+                oblique_buf: &self.textstyle_oblique,
+                height_buf: &self.textstyle_height,
+                bigfont_buf: &self.textstyle_bigfont,
+                ttf_buf: &self.textstyle_ttf,
+                backward,
+                upside_down,
+                annotative,
+            });
         }
         if Some(window_id) == self.tablestyle_window {
             use acadrust::objects::ObjectType;
diff --git a/src/ui/textstyle.rs b/src/ui/textstyle.rs
index 8c4d45e07..83c49fed8 100644
--- a/src/ui/textstyle.rs
+++ b/src/ui/textstyle.rs
@@ -1,9 +1,24 @@
 //! Text Style Font Browser window — fills the entire OS window.
 
 use crate::app::Message;
-use iced::widget::{button, column, container, row, scrollable, text, text_input, Space};
+use iced::widget::{button, checkbox, column, container, row, scrollable, text, text_input, Space};
 use iced::{Background, Border, Color, Element, Fill, Theme};
 
+/// View-model for the Text Style editor window.
+pub struct TextStyleView<'a> {
+    pub styles: Vec<String>,
+    pub selected: &'a str,
+    pub font_buf: &'a str,
+    pub width_buf: &'a str,
+    pub oblique_buf: &'a str,
+    pub height_buf: &'a str,
+    pub bigfont_buf: &'a str,
+    pub ttf_buf: &'a str,
+    pub backward: bool,
+    pub upside_down: bool,
+    pub annotative: bool,
+}
+
 const TB: Color = Color {
     r: 0.13,
     g: 0.13,
@@ -169,13 +184,20 @@ fn vsep<'a>() -> Element<'a, Message> {
         .into()
 }
 
-pub fn view_window<'a>(
-    styles: Vec<String>,
-    selected: &'a str,
-    font_buf: &'a str,
-    width_buf: &'a str,
-    oblique_buf: &'a str,
-) -> Element<'a, Message> {
+pub fn view_window<'a>(v: TextStyleView<'a>) -> Element<'a, Message> {
+    let TextStyleView {
+        styles,
+        selected,
+        font_buf,
+        width_buf,
+        oblique_buf,
+        height_buf,
+        bigfont_buf,
+        ttf_buf,
+        backward,
+        upside_down,
+        annotative,
+    } = v;
     // ── Toolbar ───────────────────────────────────────────────────────────
     let toolbar = container(
         row![
@@ -296,36 +318,48 @@ pub fn view_window<'a>(
     .height(Fill)
     .padding([12, 8]);
 
+    // Labeled numeric/text field row → TextStyleEdit { field, value }.
+    fn frow<'a>(label: &'a str, ph: &'a str, buf: &'a str, field: &'static str) -> Element<'a, Message> {
+        row![
+            text(label).size(11).color(DIM).width(120),
+            text_input(ph, buf)
+                .on_input(move |v| Message::TextStyleEdit { field, value: v })
+                .style(field_style)
+                .size(11)
+                .width(140),
+        ]
+        .spacing(6)
+        .align_y(iced::Center)
+        .into()
+    }
+
     // ── Right: Properties ─────────────────────────────────────────────────
     let props_panel = container(
         column![
             text("Properties").size(11).color(ACCENT),
+            frow("Big Font:", "big-font file…", bigfont_buf, "bigfont"),
+            frow("TrueType Font:", "e.g. Arial", ttf_buf, "ttf"),
+            frow("Fixed Height:", "0 = variable", height_buf, "height"),
+            frow("Width Factor:", "1.0", width_buf, "width"),
+            frow("Oblique (°):", "0.0", oblique_buf, "oblique"),
             row![
-                text("Width Factor:").size(11).color(DIM).width(120),
-                text_input("1.0", width_buf)
-                    .on_input(|v| Message::TextStyleEdit {
-                        field: "width",
-                        value: v
-                    })
-                    .style(field_style)
-                    .size(11)
-                    .width(90),
+                checkbox(backward)
+                    .label("Backward")
+                    .on_toggle(|_| Message::TextStyleToggle("backward"))
+                    .size(15)
+                    .text_size(11),
+                checkbox(upside_down)
+                    .label("Upside down")
+                    .on_toggle(|_| Message::TextStyleToggle("upside_down"))
+                    .size(15)
+                    .text_size(11),
             ]
-            .spacing(6)
-            .align_y(iced::Center),
-            row![
-                text("Oblique (°):").size(11).color(DIM).width(120),
-                text_input("0.0", oblique_buf)
-                    .on_input(|v| Message::TextStyleEdit {
-                        field: "oblique",
-                        value: v
-                    })
-                    .style(field_style)
-                    .size(11)
-                    .width(90),
-            ]
-            .spacing(6)
-            .align_y(iced::Center),
+            .spacing(16),
+            checkbox(annotative)
+                .label("Annotative")
+                .on_toggle(|_| Message::TextStyleToggle("annotative"))
+                .size(15)
+                .text_size(11),
             Space::new().height(8),
             text("Preview").size(10).color(DIM),
             container(text("AaBbCc 0123").size(20))