diff --git a/sksurgerybard/interaction/interaction.py b/sksurgerybard/interaction/interaction.py
index 27bac0a..52576e7 100644
--- a/sksurgerybard/interaction/interaction.py
+++ b/sksurgerybard/interaction/interaction.py
@@ -33,6 +33,9 @@ def __call__(self, event, _event_type_not_used):
             self._translate_model(key)
         if key in '8i9o0p':
             self._rotate_model(key)
+        if key == 'f':
+            self._bard_widget.tracking = not self._bard_widget.tracking
+
 
     def _translate_model(self, key):
         """
diff --git a/sksurgerybard/widgets/bard_overlay_app.py b/sksurgerybard/widgets/bard_overlay_app.py
index 5f181f7..65be060 100644
--- a/sksurgerybard/widgets/bard_overlay_app.py
+++ b/sksurgerybard/widgets/bard_overlay_app.py
@@ -43,6 +43,8 @@ def __init__(self, configuration = None, calib_dir = None):
 
         self.tracker, self.transform_manager = setup_tracker(configuration)
         self.tracker.start_tracking()
+        self.tracking = True # A boolean that we can manipulate to start/
+                             # stop tracking
 
         self.transform_manager.add("tracker2camera",
                         np.eye(4, dtype = np.float64))
@@ -166,7 +168,9 @@ def update(self):
 
         undistorted = cv2.undistort(image, self.mtx33d, self.dist15d)
 
-        self._update_tracking(image)
+        if self.tracking:
+            self._update_tracking(image)
+
         self._update_overlay_window()
 
         self.vtk_overlay_window.set_video_image(undistorted)