I don't know if this is already possible (if it is please forgive my ignorance.) However I believe it would be pretty nice if you could design windows and have a checkbox saying it can't leave the game screen. Meaning that you make pop-up windows that can be moved around but cannot leave the original "main" game window. I think this would be great for some games that have pop up inventories and things of that nature that use the skins. I don't even know if it is possible but if it is please consider.