Hello,
You can set a custom resolution in the game through the console. Open the console using ~ or Shift + ESC, and run these commands:
/r_fullscreenMode -1
/r_mode -1
/r_customWidth 1920
/r_customHeight 1080
/vid_restart
Where 1920 and 1080 are replaced by the actual resolution you wish to set. This should have the game try to use this resolution in both windowed and full screen modes.
You can set a custom resolution in the game through the console. Open the console using ~ or Shift + ESC, and run these commands:
/r_fullscreenMode -1
/r_mode -1
/r_customWidth 1920
/r_customHeight 1080
/vid_restart
Where 1920 and 1080 are replaced by the actual resolution you wish to set. This should have the game try to use this resolution in both windowed and full screen modes.