If i understand your question right, that you want the theme background to change in real-time as you scroll through your system list (?), then no it can't be done - at least not currently. There is probably a good reason for this, and i'll try to explain why: Imagine for a moment, that you have over 500 systems installed (it's not likely i know, but bare with me), now imagine GameEx has to load all these backgrounds at once, so they are available when you "scroll". Not very efficient and certainly couldn't guarantee equal performance betweens users. One person may have only 3 systems installed and GameEx loads lightning fast, another may have 100+ systems and has to wait 5 mins every boot. See what i mean? You CAN however have different backgrounds for each system, and even layouts (!) if you enable them in your theme - you'll see them once you have selected/entered each system Load your theme in the Theme Editor, Click Edit > Options, Go to Settings tab, Check Custom Emulator Layouts and Custom Module Layouts (if you want to re-arrange elements per system) You should then be able to load different backgrounds for each system/emulator