Display scaling doesn't work well for multiple apps including AC.

You both have Ultrawide monitors which means they have a 21:9 Aspect ratio instead of the standard 16:9 ratio. Which means you need to scale down to 2560x1080 resolution instead of the standard 1920x1080. That should get rid of your black bars. A 34" ultrawide monitor running 2560x1080 will have roughly the same PPI (pixels-per-inch) as a 27-inch 1080P display.

Sandeep Luthra | LTMedical.net
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