“How to change aspect ratio to 16:9? Aspect ratio is locked at 21:9 no matter what I try in the monitor’s settings. 1:1, 4:3, 27” 16:9, etc all will not save and automatically reverts back to 21:9. Anyway to flash/update the firmware of the monitor?”

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• The CU34G2XP has a native 21:9 ultrawide aspect ratio, which is why its available OSD settings won’t permanently override it. You may need to use your graphics card’s settings scaling features to try to adjust desktop size and position.

  Answered by AOC Support 5 months ago

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