diff --git a/src/components/three/XRHudInWorld.tsx b/src/components/three/XRHudInWorld.tsx
index a202b7a..95a26a2 100644
--- a/src/components/three/XRHudInWorld.tsx
+++ b/src/components/three/XRHudInWorld.tsx
@@ -53,6 +53,10 @@ export function XRHudInWorld(props: XRHudInWorldProps) {
   const leftCtrl = useXRInputSourceState('controller', 'left');
   const [open, setOpen] = useState(true);
   const [tab, setTab] = useState<Tab>('scene');
+  /** When pinned, the panel stays fixed in world space and does NOT follow the head. */
+  const [pinned, setPinned] = useState(true);
+  /** Forces re-anchor on next frame (used by "trazer" / unpin→pin). */
+  const reanchorRequested = useRef(true);
 
   const panelRef = useRef<THREE.Group>(null);
   const wristRef = useRef<THREE.Group>(null);
@@ -70,14 +74,29 @@ export function XRHudInWorld(props: XRHudInWorldProps) {
       lastABtn.current = pressed;
     }
 
-    // Floating panel ~70cm in front of head, yaw-locked, damped
+    // Floating panel:
+    //  • If pinned and already anchored once → don't move it (fixed in space).
+    //  • If unpinned → continuously follow head with damping.
+    //  • On (re)anchor request → snap target once and stop.
     if (panelRef.current && open) {
       const fwd = new THREE.Vector3(0, -0.05, -0.7).applyQuaternion(camera.quaternion);
-      targetPos.current.copy(camera.position).add(fwd);
+      const wantPos = new THREE.Vector3().copy(camera.position).add(fwd);
       const euler = new THREE.Euler().setFromQuaternion(camera.quaternion, 'YXZ');
-      targetQuat.current.setFromEuler(new THREE.Euler(0, euler.y, 0, 'YXZ'));
-      panelRef.current.position.lerp(targetPos.current, 0.12);
-      panelRef.current.quaternion.slerp(targetQuat.current, 0.18);
+      const wantQuat = new THREE.Quaternion().setFromEuler(new THREE.Euler(0, euler.y, 0, 'YXZ'));
+
+      if (reanchorRequested.current) {
+        targetPos.current.copy(wantPos);
+        targetQuat.current.copy(wantQuat);
+        panelRef.current.position.copy(wantPos);
+        panelRef.current.quaternion.copy(wantQuat);
+        reanchorRequested.current = false;
+      } else if (!pinned) {
+        targetPos.current.copy(wantPos);
+        targetQuat.current.copy(wantQuat);
+        panelRef.current.position.lerp(targetPos.current, 0.12);
+        panelRef.current.quaternion.slerp(targetQuat.current, 0.18);
+      }
+      // pinned + already anchored → leave panel where it is.
     }
 
     // Wrist toggle follows left controller
@@ -102,7 +121,14 @@ export function XRHudInWorld(props: XRHudInWorldProps) {
       <WristToggle ref={wristRef} open={open} onToggle={() => setOpen((v) => !v)} />
       {open && (
         <group ref={panelRef}>
-          <FloatingPanel tab={tab} setTab={setTab} {...props} />
+          <FloatingPanel
+            tab={tab}
+            setTab={setTab}
+            pinned={pinned}
+            onTogglePin={() => setPinned((v) => !v)}
+            onRecenter={() => { reanchorRequested.current = true; }}
+            {...props}
+          />
         </group>
       )}
     </>