diff --git a/src/components/XRHud.tsx b/src/components/XRHud.tsx
index 036637d..73d297e 100644
--- a/src/components/XRHud.tsx
+++ b/src/components/XRHud.tsx
@@ -379,6 +379,34 @@ export function XRHud({ freeMove, onToggleFreeMove, placementMode = false, onTog
                 </Button>
               )}
 
+              {/* Selection */}
+              <Button
+                variant={selectionMode ? 'default' : 'outline'}
+                size="sm" className="h-8 gap-1.5 text-[10px] font-mono"
+                onClick={() => setSelectionMode(!selectionMode)}
+                title="Selecionar elementos (viga, chapa…) — gatilho direito alterna"
+              >
+                <MousePointerClick className="h-3.5 w-3.5" />
+                {selectionMode ? (hasSelection ? `${selectedElementKeys.size} sel.` : 'Selec…') : 'Selec'}
+              </Button>
+
+              {hasSelection && (
+                <>
+                  <Button variant="ghost" size="icon" className="h-8 w-8" onClick={hideSelectedElements} title="Esconder">
+                    <EyeOff className="h-3.5 w-3.5" />
+                  </Button>
+                  <Button variant="ghost" size="icon" className="h-8 w-8" onClick={isolateSelectedElements} title="Isolar">
+                    <Focus className="h-3.5 w-3.5 text-primary" />
+                  </Button>
+                </>
+              )}
+              {hasHidden && (
+                <Button variant="ghost" size="icon" className="h-8 w-8" onClick={showAllElements} title="Mostrar tudo">
+                  <Eye className="h-3.5 w-3.5" />
+                </Button>
+              )}
+
+
               <Button variant="outline" size="icon" className="h-8 w-8" onClick={handleScreenshot} title="Screenshot">
                 <Camera className="h-3.5 w-3.5" />
               </Button>