nevermind, got my answer. i'm dumb sorry!

simple question, well i think :

let's say i want to play 1941 on the mame and have the screen flip 270° and get it widescreen (witch i can do in the retroarch menu no problem), but is there a way to tell recalbox to boot 1941 in widescreen 270° rotation and then if i quit and play arkanoid, this games plays normal. hope you underderstand what i'm saying!

recalboxOS 4.0.0
rpi 3

will mostly use it for mame.