diff --git a/src/components/XRHud.tsx b/src/components/XRHud.tsx
index 386072c..9d2c3fb 100644
--- a/src/components/XRHud.tsx
+++ b/src/components/XRHud.tsx
@@ -310,6 +310,19 @@ export function XRHud({ freeMove, onToggleFreeMove, placementMode = false, onTog
                 </Button>
               )}
 
+              {/* Allow scale (two-hand zoom) toggle */}
+              {onToggleAllowScale && (
+                <Button
+                  variant={allowScale ? 'default' : 'outline'}
+                  size="sm" className="h-8 gap-1.5 text-[10px] font-mono"
+                  onClick={onToggleAllowScale}
+                  title="Zoom por grip duplo (afastar/aproximar as mãos)"
+                >
+                  <RefreshCw className="h-3.5 w-3.5" />
+                  {allowScale ? 'Zoom ON' : 'Zoom'}
+                </Button>
+              )}
+
               {/* Scale presets */}
               <ScaleSelector variant="compact" />