diff --git a/crates/ui-egui/src/shortcuts.rs b/crates/ui-egui/src/shortcuts.rs
index 593841991..129fb1d9e 100644
--- a/crates/ui-egui/src/shortcuts.rs
+++ b/crates/ui-egui/src/shortcuts.rs
@@ -308,6 +308,10 @@ fn keyboard_owned(app: &LightcraftApp, ctx: &egui::Context) -> bool {
         return ctx.input(|input| input.key_pressed(Key::Escape))
             && app.widgets.iter().any(|(widget, _)| widget.starts_with("sliderField:") && crate::text_field::was_editing(ctx, widget));
     }
+    // a selected slider keeps its arrow keys; everything else is a shortcut
+    if crate::widgets::slider_has_focus(ctx) {
+        return ctx.input(|input| [Key::ArrowLeft, Key::ArrowRight, Key::ArrowUp, Key::ArrowDown].iter().any(|key| input.key_pressed(*key)));
+    }
     let chrome = app
         .ui
         .docking
diff --git a/crates/ui-egui/src/tests_dialog_fit.rs b/crates/ui-egui/src/tests_dialog_fit.rs
index d2d69c056..5c4f1a83f 100644
--- a/crates/ui-egui/src/tests_dialog_fit.rs
+++ b/crates/ui-egui/src/tests_dialog_fit.rs
@@ -93,9 +93,10 @@ fn export_dialog_is_unchanged_in_a_tall_window() {
     let h = export_dialog([1600.0, 1000.0]);
     assert_fits(&h, "Export at 1600×1000");
     let dialog = rect(&h, "dialog:window");
-    // (846 × 500.6 before #781: the whole dialog, nothing scrolled away)
+    // (846 tall as before #781: the whole dialog, nothing scrolled away; 546 wide since the
+    // watermark's nine positions, #833)
     assert!((dialog.height() - 846.0).abs() <= 1.0, "{dialog:?}");
-    assert!((dialog.width() - 500.6).abs() <= 1.0, "{dialog:?}");
+    assert!((dialog.width() - 546.0).abs() <= 1.0, "{dialog:?}");
 }
 
 // Scenario: other long dialogs fit a short window too, with their buttons on screen
diff --git a/crates/ui-egui/src/tests_masking.rs b/crates/ui-egui/src/tests_masking.rs
index e5edf3c7a..8024c62c5 100644
--- a/crates/ui-egui/src/tests_masking.rs
+++ b/crates/ui-egui/src/tests_masking.rs
@@ -1337,6 +1337,9 @@ fn color_range_pick_button_samples_the_photo() {
 #[test]
 fn a_selected_develop_slider_accepts_wheel_nudges() {
     let mut h = detail("panel.edit");
+    // the demo may open on the Edit panel already, which `panel.edit` then toggles shut
+    let r = h.request("ui.set", json!({"right": "edit"}), T);
+    assert_eq!(r["ok"], true, "{r}");
     h.settle(SETTLE);
     let name = "slider:light.exposure";
     let panel = h.app.widgets.iter().find(|(id, _)| id == "panel:right_panel").unwrap().1;
diff --git a/crates/ui-egui/src/widgets.rs b/crates/ui-egui/src/widgets.rs
index ea187591b..0872b2ec4 100644
--- a/crates/ui-egui/src/widgets.rs
+++ b/crates/ui-egui/src/widgets.rs
@@ -187,6 +187,7 @@ pub fn slider(ui: &mut Ui, spec: &ControlSpec, value: f64, enabled: bool, label_
     // opt-in so hovering an unfocused slider still scrolls the containing panel.
     if enabled && (resp.clicked() || resp.drag_started()) {
         resp.request_focus();
+        ui.data_mut(|d| d.insert_temp(focused_slider_key(), id));
     }
     // screen readers: a slider named after its control, with its value
     let label_text = crate::i18n::tr(label_override.unwrap_or(spec.label)).to_string();
@@ -726,3 +727,14 @@ pub(crate) fn elide_head(text: &str, max: f32, width: impl Fn(&str) -> f32) -> S
 #[cfg(test)]
 #[path = "widgets/tests_numeric_entry.rs"]
 mod numeric_entry_tests;
+
+fn focused_slider_key() -> egui::Id {
+    egui::Id::new("lightcraft-focused-slider")
+}
+
+/// Whether the widget with keyboard focus is a develop slider a click selected. It owns only the
+/// arrow keys (and the wheel): every other shortcut still works, as in Lightroom after a drag.
+pub fn slider_has_focus(ctx: &egui::Context) -> bool {
+    let focused = ctx.memory(|m| m.focused());
+    focused.is_some() && focused == ctx.data(|d| d.get_temp::<egui::Id>(focused_slider_key()))
+}