I posted this on the Libretro forum some time ago, but wanted to see if anyone here has found a way to do this. Is it possible to implement a screen gap option into the Citra core like desmume has for the regular DS? This is a very neat feature as it allows you to customise the layout for a border overlay. I have found a very nice border overlay for the 3DS but it is not useable without the simple screen gap option.