diff --git a/vedo/addons.py b/vedo/addons.py
index 46e9c0c4..0ca66bdb 100644
--- a/vedo/addons.py
+++ b/vedo/addons.py
@@ -2842,7 +2842,7 @@ def Axes(
         htitle_size=0.03,
         htitle_font=None,
         htitle_italic=False,
-        htitle_color=None,
+        htitle_color=None, htitle_backface_color=None,
         htitle_justify='bottom-left',
         htitle_rotation=0,
         htitle_offset=(0, 0.01, 0),
@@ -2931,6 +2931,7 @@ def Axes(
     - `htitle_font`,           [None], header font (defaults to `title_font`)
     - `htitle_italic`,         [True], header font is italic
     - `htitle_color`,          [None], header title color (defaults to `xtitle_color`)
+    - `htitle_backface_color`, [None], header title color on its backface
     - `htitle_justify`, ['bottom-center'], origin of the title justification
     - `htitle_offset`,   [(0,0.01,0)], control offsets of header title in x, y and z
     - `xtitle_position`,       [0.32], title fractional positions along axis
@@ -3927,6 +3928,9 @@ def Axes(
             depth=title_depth,
             italic=htitle_italic,
         )
+        if htitle_backface_color is None:
+            htitle_backface_color = 1 - np.array(get_color(htitle_color))
+            htit.backcolor(htitle_backface_color)
         htit.rotate_x(htitle_rotation)
         wpos = [htitle_offset[0]*dx, (1 + htitle_offset[1])*dy, htitle_offset[2]*dz]
         htit.shift(np.array(wpos) + [0, 0, xyshift*dz])
diff --git a/vedo/core.py b/vedo/core.py
index f17d4199..1fba2574 100644
--- a/vedo/core.py
+++ b/vedo/core.py
@@ -1516,8 +1516,7 @@ def pos(self, x=None, y=None, z=None):
     def shift(self, dx=0, dy=0, dz=0):
         """Add a vector to the current object position."""
         if utils.is_sequence(dx):
-            utils.make3d(dx)
-            dx, dy, dz = dx
+            dx, dy, dz = utils.make3d(dx)
         if dx == dy == dz == 0:
             return self
         LT = LinearTransform().translate([dx, dy, dz])
diff --git a/vedo/plotter.py b/vedo/plotter.py
index d0d82c2b..b8cc1562 100644
--- a/vedo/plotter.py
+++ b/vedo/plotter.py
@@ -3512,7 +3512,9 @@ def user_mode(self, mode):
 
     def close_window(self):
         """Close the current or the input rendering window."""
+        # https://examples.vtk.org/site/Cxx/Visualization/CloseWindow/
         vedo.last_figure = None
+        self.last_event = None
         self.sliders = []
         self.buttons = []
         self.widgets = []
@@ -3526,6 +3528,45 @@ def close_window(self):
         if settings.dry_run_mode >= 2:
             return self
 
+        # # print("Close window -------------")
+        # for r in self.renderers:
+        #     r.RemoveAllObservers()
+
+        # if hasattr(self, "window") and self.window:
+        #     if hasattr(self, "interactor") and self.interactor:
+        #         # print("Close window1")
+
+        #         self.interactor.ProcessEvents()
+        #         self.interactor.SetInteractorStyle(None)
+        #         self.interactor.RemoveAllObservers()
+        #         self.interactor.ExitCallback()
+
+        #         self.window.Finalize()
+
+        #         self.interactor.SetRenderWindow(None)
+
+        #         # print("Close window2")
+        #         # try:
+        #         #     self.interactor.SetDone(True)
+        #         # except AttributeError:
+        #         #     pass
+        #         self.interactor.TerminateApp()
+        #         # print("Close window3")
+        #         # self.interactor = None
+
+        #     # if hasattr(self, "interactor") and self.interactor:
+        #     #     if "Darwin" in vedo.sys_platform:
+        #     #         try:
+        #     #             self.interactor.ProcessEvents()
+        #     #         except:
+        #     #             pass
+        #         self.interactor = None
+
+        #     self.renderer = None  # current renderer
+        #     self.window = None
+        #     # print("Close window4")
+
+        # PREVIUOS VERSION
         for r in self.renderers:
             r.RemoveAllObservers()
         if hasattr(self, "window") and self.window:
@@ -3771,10 +3812,14 @@ def _keypress(self, iren, event):
         x, y = iren.GetEventPosition()
         renderer = iren.FindPokedRenderer(x, y)
 
-        if key in ["q", "Return", "Ctrl+q", "Ctrl+w", "Escape"]:
+        if key in ["q", "Return"]:
             iren.ExitCallback()
             return
 
+        elif key in ["Ctrl+q", "Ctrl+w", "Escape"]:
+            self.close()
+            return
+
         elif key == "F1":
             vedo.logger.info("Execution aborted. Exiting python kernel now.")
             iren.ExitCallback()
diff --git a/vedo/pointcloud.py b/vedo/pointcloud.py
index b08d2a99..19e9ca1c 100644
--- a/vedo/pointcloud.py
+++ b/vedo/pointcloud.py
@@ -1456,6 +1456,9 @@ def closest_point(
             If you want to reset it use `mymesh.point_locator=None`
             and / or `mymesh.cell_locator=None`.
         """
+        if len(pt) != 3:
+            pt = [pt[0], pt[1], 0]
+
         # NB: every time the mesh moves or is warped the locators are set to None
         if ((n > 1 or radius) or (n == 1 and return_point_id)) and not return_cell_id:
             poly = None