Toggleble Auto Full Screen Libretro

What if you want to play a game and have it full screen without going through libretro menu every time?

It’d be nice you can toggle which Libretro item goes auto full screen.
TVs and Handheld consoles easy to see the Libreto’s menu screen. With arcade machines they’re a different story. (Yes, I’m silly playing console games on them)

Would come in handy playing games that needs to be readable. Like RPGs.