When I try to move a component of my drawing, sometimes strange things happen with zooming.  The drawing will not move with my mouse pointer, sometimes it moves way far away from where I'm trying to place it.  Sometimes I will try to place a box and the box will be made very far away from where I am placing it with my mouse.  When I undo after something like this happens, the command window reads as "undo intellizoom."  I have not found any help or information about this behavior or what "intellizoom" is and how it is caused.  Help would be much appreciated!