How do I set the resolution/aspect ratio of the output screen?

[TheDodgyJammer]

I’m building a desktop game and using the aspect ratio of 9:16, borderless, the Camera Actor is set accordingly.

But when I run the simulation as a Standalone Game I get the standard 16:9 screen, leaving me with black vertical boxes on either side of my 9:16 Camera view.

How do I adjust the resolution/aspect ratio of the output screen to match my Camera Actor?

UE5.4.4

I have tried to Set Screen Resolution with the following node setup.

Beginner dev, be gentle, I’ve lost enough hair trying to solve this.

Thanks.

[LegendGary]

Try : Game User Setting > Apply Resolution Settings

[TheDodgyJammer]

(post deleted by author)

[TheDodgyJammer]

Thanks, much appreciated! Solution was Game User Settings > Set Screen Resolution > Apply Settings