Actual Size option in Teleprompter mode

I love the teleprompter mode when using a projector as the display device but the images (and movies) are enlarged in full screen mode. I need this for photographic judging and shows and all images and movies MUST be shown at actual size. Unfortunately this is a deal breaker for me. QuickTime Player, Preview and Keynote all have actual size options for full screen mode, so I know it can be done.