totally new to linux and raspberry, maybe someone here could help :
i don't know if this is possible to force it that way but if it is, it could help a lot : big size 4/3 ou 5/4 screens dont exist.
and new wide screens always have useless big black borders on old games.
the goal would be to use a big flat tv, rotate it 90, partly hidden in an arcade upright cabinet to use only a portion of it to display recalbox or any software distribution a zone in an oldschool 4/3 ou 5/4 ratio better for display the old arcade games and as big as possible without black borders.
it would look kinda like this :