Merge PR #1280 and expose constraint value visibility

src/app/command_driver.rs

@@ -8038,6 +8038,15 @@ mod parametric_constraint_undo_tests {
                 crate::scene::model::object::PropValue::ParamRow { name, .. }
                     if name == "width"
             )));
+        assert!(app.tabs[app.active_tab]
+            .properties
+            .sections
+            .iter()
+            .flat_map(|section| &section.props)
+            .any(|property| matches!(
+                property.value,
+                crate::scene::model::object::PropValue::ParamsVisibilityToggle(_)
+            )));
     }
 
     /// End-to-end through the actual `Message` handlers a Properties-panel

src/app/commands/inquiry.rs

@@ -25,7 +25,7 @@ impl OpenCADStudio {
             .collect();
         if handles.len() < 2 {
             self.command_line
-                .push_info(crate::t!("Select at least two unlocked objects to align.").as_ref());
+                .push_info(crate::t!("Select objects").as_ref());
             return;
         }
 
@@ -54,8 +54,6 @@ impl OpenCADStudio {
             })
             .collect();
         if bounds.len() < 2 {
-            self.command_line
-                .push_info(crate::t!("The selected objects do not provide usable bounds.").as_ref());
             return;
         }
 

src/app/properties.rs

@@ -487,7 +487,14 @@ impl OpenCADStudio {
                         PropSection {
                             title: t!("Parameters").into_owned(),
                             props: {
-                                let mut props: Vec<Property> = scene
+                                let mut props = vec![Property {
+                                    label: String::new(),
+                                    field: "show_constraint_values",
+                                    value: PropValue::ParamsVisibilityToggle(
+                                        self.show_constraint_values,
+                                    ),
+                                }];
+                                props.extend(scene
                                     .named_parameters()
                                     .iter()
                                     .enumerate()
@@ -503,8 +510,7 @@ impl OpenCADStudio {
                                                 .resolve(&parameter.name)
                                                 .map_err(|error| error.to_string()),
                                         },
-                                    })
+                                    }));
-                                    .collect();
                                 props.push(Property {
                                     label: String::new(),
                                     field: "named_parameter_add",
@@ -3267,6 +3273,9 @@ fn make_sections_read_only(sections: &mut [crate::scene::model::object::PropSect
             PropValue::EntityLink { handles, .. } => format!("{} entity link(s)", handles.len()),
             PropValue::ParamRow { name, formula, .. } => format!("{name} = {formula}"),
             PropValue::ParamAddRow => String::new(),
+            PropValue::ParamsVisibilityToggle(value) => {
+                if *value { t!("On") } else { t!("Off") }.into_owned()
+            }
         };
         property.field = "locked_read_only";
         property.value = PropValue::ReadOnly(text);

src/app/view/overlay.rs

@@ -1256,7 +1256,7 @@ pub(super) fn viewport_context_menu_overlay(
             // none of the entity-selection actions above (Move/Copy/Isolate/
             // Select Similar) apply to it.
             items.push(item(
-                t!("Delete Constraint").into_owned(),
+                t!("Delete").into_owned(),
                 Message::PropConstraintDelete(id),
             ));
             items.push(sep());

src/scene/model/object.rs

@@ -85,6 +85,11 @@ pub enum PropValue {
     },
     /// The trailing "+ Add parameter" row in the Parameters section.
     ParamAddRow,
+    /// The Parameters section's leading header row (no-selection page only):
+    /// a global on/off toggle for whether any constraint pill in the
+    /// viewport shows its driven value/parameter-name text. Mirrors
+    /// `App::show_constraint_values`.
+    ParamsVisibilityToggle(bool),
 }
 
 /// A single property row in the Properties panel.

src/scene/selection.rs

@@ -754,7 +754,8 @@ impl Scene {
                                 | PropValue::FieldLwVaries { .. }
                                 | PropValue::EntityLink { .. }
                                 | PropValue::ParamRow { .. }
-                                | PropValue::ParamAddRow => continue,
+                                | PropValue::ParamAddRow
+                                | PropValue::ParamsVisibilityToggle(_) => continue,
                             }
                         };
                         out.push(choice(prop.field, prop.label, editor));
@@ -891,7 +892,8 @@ impl Scene {
                     | PropValue::FieldLwVaries { .. }
                     | PropValue::EntityLink { .. }
                     | PropValue::ParamRow { .. }
-                    | PropValue::ParamAddRow => return None,
+                    | PropValue::ParamAddRow
+                    | PropValue::ParamsVisibilityToggle(_) => return None,
                 })
             }
         }

src/ui/properties.rs

@@ -872,6 +872,7 @@ impl PropertiesPanel {
                 self.render_param_row(*index, name, formula, resolved)
             }
             PropValue::ParamAddRow => render_param_add_row(),
+            PropValue::ParamsVisibilityToggle(value) => render_params_visibility_toggle_row(*value),
         }
     }
 
@@ -1984,6 +1985,43 @@ fn render_param_add_row<'a>() -> Element<'a, Message> {
     container(btn).width(Length::Fill).into()
 }
 
+// ── Parameters section: leading global visibility toggle ───────────────────
+
+/// The Parameters section's leading header row (no-selection page): a
+/// global on/off toggle for whether any constraint pill in the viewport
+/// shows its driven value/parameter-name text — lives next to the
+/// named-parameter table it governs.
+fn render_params_visibility_toggle_row<'a>(value: bool) -> Element<'a, Message> {
+    let btn_label = if value { t!("On") } else { t!("Off") }.into_owned();
+    let btn = button(
+        row![
+            crate::ui::icons::semantic(crate::ui::icons::layer_visible(value), 13.0),
+            text(btn_label).size(FONT_SZ),
+        ]
+        .spacing(6)
+        .align_y(iced::Center),
+    )
+    .on_press(Message::ShowConstraintValuesChanged(!value))
+    .style(move |theme: &Theme, status| {
+        let palette = theme.palette();
+        let pair = match status {
+            button::Status::Hovered | button::Status::Pressed => palette.background.weak,
+            _ => palette.background.base,
+        };
+        button::Style {
+            background: Some(Background::Color(pair.color)),
+            border: Border { color: palette.background.neutral.color, width: 1.0, radius: 2.0.into() },
+            text_color: pair.text,
+            ..Default::default()
+        }
+    })
+    .padding([4, 8])
+    .width(Length::Fill);
+    container(row![text(t!("Values").into_owned()).size(FONT_SZ).width(Length::Fill), btn].align_y(iced::Center))
+        .width(Length::Fill)
+        .into()
+}
+
 /// Build a label | widget property row.
 fn prop_row_widget<'a>(label: &'a str, widget: Element<'a, Message>) -> Element<'a, Message> {
     prop_row_with_active(label, widget, false)