Question 16:9 + 21:9 Dual setup aspect ratio help

jam144

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Apr 21, 2018
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I have recently added one of my old 21:9 monitors to my current setup which already had a 16:9 monitor. The 21:9 monitor is mounted vertically next to the 16:9 monitor, however the 21:9 monitor isn't displaying in full screen. It seems like it's displaying the same aspect ratio as the 16:9 monitor and there are two black bars at the top and bottom of the monitor, I can't find a way to make it fill the whole screen.

Any help would be amazing!!

GTX 1660ti
Ryzen 5 1600