Hi!  Awhile ago, a Dell Tech person told me how to "toggle" the screen size on the latitude to get it to fit the screen.  I can't remember what that toggle key was.  Anyone have any ideas?  I know how to get the screen to toggle to an external monitor, etc., this toggle key was a different thing altogether.  When I had rebuilt my laptop, the screen wouldn't go to full size, just a block in the middle of the screen.  This toggle key made it full size again.  Thanks for your help!