Rotating screen for vertical cocktail arcade games

[Projectfreedom]

When I use display_rotate=1 command line in the config.txt it rotates the display, but into a landscape aspect... How do I rotate it but keep it in portrait view for cocktail games?

Tags: #help #screenrotation

[mitu]

Please add more info about your system, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

[Projectfreedom]

Pi Model or other hardware: Pi 4 2Gb running emulation station
Power Supply used: official pi adaptor
RetroPie Version Used: v4.6
Built From: retropie-buster-4.6-rpi4
USB Devices connected: 2 x dragonwise USB joysticks + keyboard

[mitu]

The Pi4 doesn't support the rotate_display parameter anymore - see https://www.raspberrypi.org/documentation/configuration/config-txt/video.md. At some point, it was possible to use display_rotate=2 to flip the screen, but after a firmware update this year, this is also no longer supported.

There is some guidance on how to rotate the display on the Pi4 here or at a similar post here in the forums.