diff --git a/crates/ui-egui/src/ribbon.rs b/crates/ui-egui/src/ribbon.rs
index c91c16e14..9308e8e75 100644
--- a/crates/ui-egui/src/ribbon.rs
+++ b/crates/ui-egui/src/ribbon.rs
@@ -994,7 +994,7 @@ fn design(app: &mut WordApp, ui: &mut Ui) {
 }
 
 fn layout(app: &mut WordApp, ui: &mut Ui) {
-    group(ui, "Page Setup", Some("ui.dialog"), app, |ui, app| {
+    group(ui, "Page Setup", Some("layout.pageSetup"), app, |ui, app| {
         // Text Direction works on what the caret is in: table cells, a text box, else the section.
         let dir = wordcraft_engine::cmd::page::text_direction_at(&app.session);
         menu_button(ui, app, "textDirection", Some("Text\nDirection"), "Text Direction", true, |ui, app| {
@@ -2293,6 +2293,21 @@ mod tests {
         assert!(!contextual_tabs(&s).contains(&"Shape Format"));
     }
 
+    #[test]
+    fn page_setup_launcher_opens_the_dialog() {
+        // A group launcher runs its command with no parameters (#471).
+        let mut app = crate::WordApp::new(Session::new(wordcraft_doc::Document::new()), crate::Services::default());
+        app.run("layout.pageSetup", json!({})).unwrap();
+        assert!(matches!(app.dialog, Some(crate::dialogs::Dialog::PageSetup { .. })));
+        // `ui.dialog` needs a dialog name, so it can't be a launcher.
+        let launchers: Vec<&str> = include_str!("ribbon.rs")
+            .split("group(ui, \"")
+            .filter_map(|g| g.split_once('"')?.1.strip_prefix(", Some(\"")?.split('"').next())
+            .collect();
+        assert!(launchers.contains(&"layout.pageSetup"), "{launchers:?}");
+        assert!(!launchers.contains(&"ui.dialog"), "{launchers:?}");
+    }
+
     #[test]
     fn smart_art_picker_inserts_and_design_tab_follows_the_selection() {
         let mut app = crate::WordApp::new(Session::new(wordcraft_doc::Document::new()), Default::default());