diff --git a/crates/ui-egui/locales/de.json b/crates/ui-egui/locales/de.json
index 64a485ed..b8aaff93 100644
--- a/crates/ui-egui/locales/de.json
+++ b/crates/ui-egui/locales/de.json
@@ -1887,5 +1887,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "Klicken, um einen Wert einzugeben"
 }
diff --git a/crates/ui-egui/locales/es.json b/crates/ui-egui/locales/es.json
index 461fa2f6..9f0362c3 100644
--- a/crates/ui-egui/locales/es.json
+++ b/crates/ui-egui/locales/es.json
@@ -1732,5 +1732,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "Hacer clic para escribir un valor"
 }
diff --git a/crates/ui-egui/locales/ja.json b/crates/ui-egui/locales/ja.json
index 49f2ef80..1617546b 100644
--- a/crates/ui-egui/locales/ja.json
+++ b/crates/ui-egui/locales/ja.json
@@ -1732,5 +1732,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "クリックして値を入力"
 }
diff --git a/crates/ui-egui/locales/pt-br.json b/crates/ui-egui/locales/pt-br.json
index 81e331c5..f87b9369 100644
--- a/crates/ui-egui/locales/pt-br.json
+++ b/crates/ui-egui/locales/pt-br.json
@@ -1732,5 +1732,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "Clique para digitar um valor"
 }
diff --git a/crates/ui-egui/locales/ru.json b/crates/ui-egui/locales/ru.json
index 56ed5798..b7d5a0b6 100644
--- a/crates/ui-egui/locales/ru.json
+++ b/crates/ui-egui/locales/ru.json
@@ -1405,5 +1405,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "Щёлкните, чтобы ввести значение"
 }
diff --git a/crates/ui-egui/locales/zh-hans.json b/crates/ui-egui/locales/zh-hans.json
index 4074dfbd..ec8621b2 100644
--- a/crates/ui-egui/locales/zh-hans.json
+++ b/crates/ui-egui/locales/zh-hans.json
@@ -1732,5 +1732,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "点击以输入数值"
 }
diff --git a/crates/ui-egui/locales/zh-hant.json b/crates/ui-egui/locales/zh-hant.json
index 96fcbb18..90199415 100644
--- a/crates/ui-egui/locales/zh-hant.json
+++ b/crates/ui-egui/locales/zh-hant.json
@@ -1732,5 +1732,6 @@
   "Pending photo action cancelled": "Pending photo action cancelled",
   "Pending photo action cancelled because its library or photo changed": "Pending photo action cancelled because its library or photo changed",
   "ONNX model": "ONNX model",
-  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions"
+  "commercial use subject to GPL conditions": "commercial use subject to GPL conditions",
+  "Click to type a value": "按一下以輸入數值"
 }
diff --git a/crates/ui-egui/src/tests_crop_rotate.rs b/crates/ui-egui/src/tests_crop_rotate.rs
index f5aca4e7..977cb4eb 100644
--- a/crates/ui-egui/src/tests_crop_rotate.rs
+++ b/crates/ui-egui/src/tests_crop_rotate.rs
@@ -99,3 +99,18 @@ fn the_angle_reads_like_the_straighten_value() {
     assert_eq!(crop_angle_label(-12.254), "-12.25°");
     assert_eq!(crop_angle_label(-0.001), "0.00°", "no minus zero, and every zero the same");
 }
+
+/// Hovering the Straighten value says that a value can be typed there.
+#[test]
+fn the_straighten_value_says_it_can_be_typed() {
+    let mut h = crop_tool();
+    let r = h.request("ui.hoverWidget", json!({"id": "sliderValue:crop.angle"}), T);
+    assert_eq!(r["ok"], true, "{r}");
+    // tooltips wait for the pointer to rest
+    let _ = h.step_until(Duration::from_secs(5), |h| h.painted_text().iter().any(|t| t.contains("type")));
+    assert!(
+        h.painted_text().iter().any(|t| t == "Click to type a value"),
+        "{:?}",
+        h.painted_text().iter().filter(|t| t.contains("lick")).collect::<Vec<_>>()
+    );
+}
diff --git a/crates/ui-egui/src/widgets.rs b/crates/ui-egui/src/widgets.rs
index 8865995f..9d41f1b7 100644
--- a/crates/ui-egui/src/widgets.rs
+++ b/crates/ui-egui/src/widgets.rs
@@ -180,6 +180,8 @@ pub fn slider(ui: &mut Ui, spec: &ControlSpec, value: f64, enabled: bool, label_
     let value_rect = Rect::from_min_max(pos2(label_rect.right() - 64.0, label_rect.top()), label_rect.max);
     let value_resp = ui.interact(value_rect, id.with("value"), if enabled { Sense::click() } else { Sense::hover() });
     register(ui.ctx(), format!("sliderValue:{}", spec.id), value_rect);
+    // say that an exact value can be typed here (issue #534: an exact crop angle was hard to find)
+    let value_resp = if enabled { value_resp.on_hover_text(crate::i18n::tr("Click to type a value")) } else { value_resp };
     let typing_id = id.with("typing");
     let field_id = id.with("typingField");
     // the text being typed and how many frames the field has been up: it takes the keyboard on its