Windows 10: How to remove black bars when lowering resolution/How to Make screen stretch instead of...

Lowering my resolution in-game and normally adds black bars instead of stretching, I didn't mess with any setting or anything, it just does it now, it never used to do this how do i fix it?

:)

 

Screen Resolution Stretched

One evening my monitor went black and came back up immediately but the screen was stretched and icons large. I was able to adjust the icons but the screen was stretched. None of the screen resolution options have any affect on correcting the problem. Looking
for suggestions, thank you.

 

How to lower resolution and keep display size

Hello, I have a 4k display on a laptop. (Asus zenbook pro. windows 10). I'm trying to lower the resolution. When I do this, the display shrinks and there's a black border around the smaller screen size. I would like to keep this lower resolution and stretch
the display to the whole screen. How can I do this?? Thanks

 

Screen Resolution

Recently overnight my screen resolution changed. The original recommended resolution was 1600 by 900. That resolution is not listed in the display resolution list, and what is currently recommended stretches the screen and anything displayed. Is there a
way to add the correct resolution?

Thanks