diff --git a/src/components/ViewCube.tsx b/src/components/ViewCube.tsx
index e34d6ed..7fbd117 100644
--- a/src/components/ViewCube.tsx
+++ b/src/components/ViewCube.tsx
@@ -13,7 +13,7 @@ import {
 } from './three/viewCubeBus';
 import { useModelStore } from '@/stores/useModelStore';
 import { getModelLocalGroup } from '@/lib/modelTransforms';
-import { Check, RotateCcw } from 'lucide-react';
+import { Check, RotateCcw, Maximize2 } from 'lucide-react';
 import { toast } from 'sonner';
 
 /** Builds a square canvas texture with a label centered on it. */
@@ -296,6 +296,23 @@ export function ViewCube() {
           <RotateCcw className="h-2.5 w-2.5" /> reset
         </button>
       )}
+
+      {/* Botão de Tela Cheia */}
+      <button
+        type="button"
+        onClick={() => {
+          const container = document.getElementById("canvas-container");
+          if (container) {
+            container.requestFullscreen().catch((err) => {
+              toast.error("Não foi possível entrar em tela cheia: " + err.message);
+            });
+          }
+        }}
+        className="flex h-7 w-full items-center justify-center gap-1 rounded border border-primary/40 bg-background/40 font-mono text-[10px] uppercase tracking-widest text-primary hover:bg-primary/10 transition-colors"
+        title="Entrar em modo tela cheia"
+      >
+        <Maximize2 className="h-3 w-3" /> Tela Cheia
+      </button>
     </div>
   );
 }
diff --git a/src/pages/Viewer.tsx b/src/pages/Viewer.tsx
index 07835c1..8482d64 100644
--- a/src/pages/Viewer.tsx
+++ b/src/pages/Viewer.tsx
@@ -1,6 +1,6 @@
 import { useNavigate, useSearchParams } from "react-router-dom";
 import { supabase } from "@/integrations/supabase/client";
-import { ArrowLeft, Glasses, Box, Ruler, FileText, Upload, Loader2, Users } from "lucide-react";
+import { ArrowLeft, Glasses, Box, Ruler, FileText, Upload, Loader2, Users, Menu, Target } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useModelStore } from "@/stores/useModelStore";
 import { ModelViewerCanvas } from "@/components/three/ModelViewer";
@@ -21,6 +21,7 @@ import { Separator } from "@/components/ui/separator";
 import { getSupportedExtension, convertToGLB, ACCEPTED_EXTENSIONS } from "@/lib/convertToGLB";
 import { validateModelFile } from "@/lib/validateModelFile";
 import { convertIFCtoGLB } from "@/lib/convertIFC";
+import { mainCameraRef, mainControlsRef } from "@/components/three/viewCubeBus";
 
 const Viewer = () => {
   const navigate = useNavigate();
@@ -39,6 +40,44 @@ const Viewer = () => {
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [converting, setConverting] = useState(false);
 
+  const [isFullscreen, setIsFullscreen] = useState(false);
+  const [sidebarOpen, setSidebarOpen] = useState(true);
+
+  useEffect(() => {
+    const handleFullscreenChange = () => {
+      setIsFullscreen(!!document.fullscreenElement);
+    };
+    document.addEventListener("fullscreenchange", handleFullscreenChange);
+    return () => {
+      document.removeEventListener("fullscreenchange", handleFullscreenChange);
+    };
+  }, []);
+
+  const handleRecenter = useCallback(() => {
+    const camera = mainCameraRef.current;
+    const controls = mainControlsRef.current;
+    if (camera) {
+      camera.position.set(2, 2, 2);
+      camera.up.set(0, 1, 0);
+      camera.lookAt(0, 0, 0);
+    }
+    if (controls) {
+      // @ts-ignore
+      controls.target.set(0, 0, 0);
+      // @ts-ignore
+      controls.update();
+    }
+    toast.success("Visualização centralizada");
+  }, []);
+
+  const exitFullscreen = useCallback(() => {
+    if (document.fullscreenElement) {
+      document.exitFullscreen().catch((err) => {
+        console.error("Erro ao sair de tela cheia:", err);
+      });
+    }
+  }, []);
+
   const [searchParams] = useSearchParams();
   const roomId = searchParams.get("room");
   const channelRef = useRef<ReturnType<typeof supabase.channel> | null>(null);
@@ -325,15 +364,51 @@ const Viewer = () => {
 
       <div className="flex flex-1 overflow-hidden">
         {/* 3D Canvas with floating controls */}
-        <div className="relative flex-1">
+        <div className="relative flex-1" id="canvas-container">
           <ModelViewerCanvas />
-          <ViewCube />
-          <ViewerControls />
-          <SectionCutPanel />
+          {isFullscreen ? (
+            <div className="absolute top-4 left-4 z-50 flex gap-2">
+              <Button
+                variant="outline"
+                className="gap-2 bg-background/80 border-primary/40 hover:bg-primary/20 text-foreground font-mono shadow-md backdrop-blur-sm h-9"
+                onClick={handleRecenter}
+              >
+                <Target className="h-4 w-4 text-primary animate-pulse" />
+                Centralizar
+              </Button>
+              <Button
+                variant="outline"
+                className="gap-2 bg-background/80 border-destructive/40 hover:bg-destructive/20 text-foreground font-mono shadow-md backdrop-blur-sm h-9"
+                onClick={exitFullscreen}
+              >
+                <ArrowLeft className="h-4 w-4 text-destructive" />
+                Retornar (ESC)
+              </Button>
+            </div>
+          ) : (
+            <>
+              {/* Botão de Toggle do Sidebar */}
+              <Button
+                variant="outline"
+                size="icon"
+                onClick={() => setSidebarOpen(!sidebarOpen)}
+                className={`absolute z-30 h-8 w-8 rounded-md bg-background/80 border-primary/30 text-primary shadow-md hover:bg-primary/10 transition-all duration-300 ${
+                  sidebarOpen ? "right-[332px]" : "right-4"
+                } top-[205px]`}
+                title={sidebarOpen ? "Recolher menu" : "Expandir menu"}
+              >
+                <Menu className="h-4 w-4" />
+              </Button>
+
+              <ViewCube />
+              <ViewerControls />
+              <SectionCutPanel />
+            </>
+          )}
         </div>
 
         {/* Side panel */}
-        <aside className="w-80 shrink-0 border-l bg-card">
+        <aside className={`transition-all duration-300 border-l bg-card flex flex-col ${sidebarOpen ? 'w-80 opacity-100' : 'w-0 opacity-0 pointer-events-none border-l-0 overflow-hidden'}`}>
           <ScrollArea className="h-full">
             <div className="p-4 space-y-5">
               <div>