<p>Are you creating themes on a 16:9 screen to use on a 4:3 projector? If so, then the solution is to go in to your settings, on the General tab, and set the Display position to a 1024x768 resolution, or whatever your projector is. If you're using a 16:9 dispay for projecting, then the solution is to use a proper aspect ratio'd image.</p>