When streaming Xbox One game to Windows 10, how do I get it to display full screen

[Subakna]

My monitor resolution is 2560x1080 and it's cut off on both the left and right sides of the screen. I can't figure out how to fix it. Here's a picture to show what I'm getting

 

[basroil]

Sounds like you have an ultrawide 21:9 monitor. You can't "fix" it because it's not broken. The xbox one does not support 21:9, only 16:9.

 

[sizzling]

The only fix would be stretching the image as your monitor is a different aspect ratio and that would make the image look weird/poor. Its actually doing the best thing to display the image as best it can

 

[Subakna]

I've been playing off this monitor for awhile now and don't get the black bars when playing straight from the Xbox itself, it's once I hit that stream button on Windows 10 is when the bars pop up. So I'll have to try changing the aspect ratio to get rid of these black bars?

 

[basroil]

I've been playing off this monitor for awhile now and don't get the black bars when playing straight from the Xbox itself, it's once I hit that stream button on Windows 10 is when the bars pop up. So I'll have to try changing the aspect ratio to get rid of these black bars?

Please look at https://support.xbox.com/en-US/xbox-one/system/tv-resolutions

The Xbox does not support your monitor resolution. Most likely the monitor itself was just stretching the image from 16:9 to 21:9, or perhaps zooming the image. The black bars are the correct way to display the image.