The plan is to make a template background image for all Emulators, Then add in the specific buttons for each one and then apply to the theme background.So before playing any games they can see what does what and how to exit and save etc.
It will be a pretty basic background with the controller image (see attached jpeg) along the top maybe with the button config/hot keys along the bottom. Maybe different colours.. Ideas?
I like this idea. My plan is doing this a la blueprint on the theme Im working, on the lower part of the system selection menu,making it less intrusive and compatible with different backgrounds( or reusable in different themes), but it is a lot of work tracing all the controllers, and found the same problem as you.