diff --git a/system/plots.py b/system/plots.py
index 1ebebaa..33004c5 100644
--- a/system/plots.py
+++ b/system/plots.py
@@ -282,8 +282,9 @@ class MainView (gtk.Notebook):
         ## Hide all plots that will be removed from the screen. 
         for x in range(self._views.xsize):
             for y in range(self._views.ysize):
-                if width < x or height < y:
+                if x >= width or y >= height:
                     self._views[x, y].set_view(None)
+                    self._view_frames.remove(self._views[x, y])
 
         for x in range(self._views.xsize):
             for y in range(self._views.ysize):