What I do is create my background image at 1280 x 1024, but in Screen4, I create the Screenset at 1024 x 768. Then let mach3 enlarge it to fit the screen. This makes it much easier to use Screen4, and I don't notice any loss of quality on my buttons or LED's. I have noticed that text on my background sometimes is not clear enough. In those instances, I create a separate image of the text, and assign it to an unused LED over the top of it.