@tjfriese Hi! Read This:
https://github.com/recalbox/recalbox-os/wiki/Video-configuration-detailled-(EN)

@seb4usc
It may just work by luck, as this screens are not supported by the standard, same problem in Retropie. You can find the documentation here :
https://github.com/raspberrypi/documentation/blob/master/configuration/config-txt/video.md#hdmi_mode
Now, you can always try out some things. For ES, it should be in /recalbox/share/system/recalbox.conf the line : global.videomode=default or to find a working way around with offsets. Not sure that it will work.

What else could help you, the descriptions in this config.txt
https://learn.adafruit.com/hdmi-uberguide/1303-pixel-qi-10-display-with-controller-1024x600

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Merci