I wanted commands to change my screen to 1080p and 4k, and I figured I should share what I found to potentially save others some time
First you have to download an app called QRes. I got it from
here.
I recommend saving it somewhere where it won't get accidentally deleted.
Then create a new command
Click on Other->Windows -> run application
For the path use "[folder]\QRes.exe" where [folder] is the full path to where you saved QRes.
If you were going to set the resolution to 1090p you would put "/x:1920 y/1080" in "with these parameters"
Alternatively, you could set text variables "width" and "height", then put "/x:{TXT:width} /y:{TXT:height}" in.
Or you could set integer variables to "width" and "height", then put "/x:{INT:width} /y:{INT:height}" in.