In an older version of retroarch i could change the screen size manually to fill out the whole tv-screen in each emulator. I do no longer find the option in the retroarch menu.
Ah ok. Will try tom. But the old option was really easy. Just press a button in the grey green retroarch menu till the screen was full and then switch to the next side.
they changed the menu options in retroarch. from memory it’s now:
– turn aspect ratio index to ‘custom’
– adjust the width/heigh custom viewport options as desired.