diff --git a/src/components/ai-edition/CursorPane.levels.test.tsx b/src/components/ai-edition/CursorPane.levels.test.tsx
index bc714e2f7..480f1d8ed 100644
--- a/src/components/ai-edition/CursorPane.levels.test.tsx
+++ b/src/components/ai-edition/CursorPane.levels.test.tsx
@@ -6,8 +6,18 @@ import { LOCALE_STORAGE_KEY } from "@/i18n/config";
 import { assetSchema, clipSchema, createEmptyDocument } from "@/lib/ai-edition/schema";
 import { useProjectStore } from "@/lib/ai-edition/store/projectStore";
 import { type NativeCursorType, nativeBridgeClient } from "@/native";
+import { setCurrentNativeViewId } from "@/native/nativeCompositorStore";
 import { CursorPane } from "./RightPanes";
 
+const compositor = vi.hoisted(() => ({
+	setCompositorParam: vi.fn(async () => undefined),
+}));
+
+vi.mock("@/native/compositorViewClient", async (importOriginal) => ({
+	...(await importOriginal<typeof import("@/native/compositorViewClient")>()),
+	setCompositorParam: compositor.setCompositorParam,
+}));
+
 beforeEach(() => {
 	const store = new Map<string, string>([[LOCALE_STORAGE_KEY, "en"]]);
 	Object.defineProperty(globalThis, "localStorage", {
@@ -187,7 +197,33 @@ describe("CursorPane size", () => {
 	it("is a slider from the default up to four times it", () => {
 		renderWithCursor({ cursorSize: 4.5 });
 		const slider = screen.getByRole("slider", { name: "Size" }) as HTMLInputElement;
-		expect([slider.min, slider.max, slider.value]).toEqual(["1.5", "6", "4.5"]);
+		expect([slider.min, slider.max, slider.value]).toEqual(["150", "600", "450"]);
+	});
+
+	// #1436: the value is a scale, so the pixels it draws depend on the output size.
+	it("shows its value as a percentage, and stores the scale", () => {
+		renderWithCursor({ cursorSize: 4.5 });
+		expect(screen.getByText("450%")).toBeTruthy();
+
+		const slider = screen.getByRole("slider", { name: "Size" });
+		fireEvent.change(slider, { target: { value: "345" } });
+		fireEvent.mouseUp(slider);
+
+		expect(useProjectStore.getState().document?.legacyEditor).toMatchObject({ cursorSize: 3.45 });
+		expect(screen.getByText("345%")).toBeTruthy();
+	});
+
+	it("sends the native preview the scale, not the percentage", () => {
+		setCurrentNativeViewId(7);
+		try {
+			renderWithCursor({ cursorSize: 4.5 });
+			fireEvent.change(screen.getByRole("slider", { name: "Size" }), { target: { value: "345" } });
+
+			expect(compositor.setCompositorParam).toHaveBeenCalledWith(7, "cursorSize", 3.45);
+			expect(compositor.setCompositorParam).not.toHaveBeenCalledWith(7, "cursorSize", 345);
+		} finally {
+			setCurrentNativeViewId(null);
+		}
 	});
 });
 
diff --git a/src/components/ai-edition/RightPanes.tsx b/src/components/ai-edition/RightPanes.tsx
index 1e0c67410..32cbcd1e8 100644
--- a/src/components/ai-edition/RightPanes.tsx
+++ b/src/components/ai-edition/RightPanes.tsx
@@ -3867,15 +3867,16 @@ export function CursorPane() {
 				    `SETTING_BOUNDS` keeps both ends sane. */}
 				<SliderCell
 					label={ts("cursor.size")}
-					value={settings.cursor.size}
-					min={SETTING_BOUNDS.cursorSize[0]}
-					max={SETTING_BOUNDS.cursorSize[1]}
-					step={0.05}
-					defaultValue={DEFAULT_EDITOR_SETTINGS.cursor.size}
+					value={settings.cursor.size * 100}
+					min={SETTING_BOUNDS.cursorSize[0] * 100}
+					max={SETTING_BOUNDS.cursorSize[1] * 100}
+					step={5}
+					defaultValue={DEFAULT_EDITOR_SETTINGS.cursor.size * 100}
+					suffix="%"
 					disabled={!hasDocument}
 					onChange={(v) => {
-						setLive({ cursor: { size: v } });
-						if (isNativeCompositorActive()) setNativeParam("cursorSize", v);
+						setLive({ cursor: { size: v / 100 } });
+						if (isNativeCompositorActive()) setNativeParam("cursorSize", v / 100);
 					}}
 					onCommit={() => void commit()}
 				/>