diff --git a/src/components/ViewerControls.tsx b/src/components/ViewerControls.tsx
index 4971f85..725a415 100644
--- a/src/components/ViewerControls.tsx
+++ b/src/components/ViewerControls.tsx
@@ -70,7 +70,9 @@ export function ViewerControls() {
         <span className="font-mono text-xs">Grid</span>
       </Button>
 
-      {/* Render mode cycle: solid -> wireframe -> edges */}
+      {/* Scale presets */}
+      <ScaleSelector />
+
       <Button
         variant={renderMode !== 'solid' ? 'default' : 'outline'}
         size="sm"