How to change aspect ratio in Windows 10

I have 4:3 display and I'm trying to find an option which can give me 21:9 and try to play a game. I found something here (in the last reply) but I think it's outdated now because I don't see that option. In the Radeon center, I found some 16:9 resolutions but not 21:9.

4 Sorted by: Reset to default

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