1080p borderless window on 4k screen?

  • Hi. Thanks for the great game.
    I really like playing this game but sometimes i habe to alt-tab quickly.
    My desktop resolution in win10 on my AMD R9 nano is 4k.
    I would like to play Chiv2 in 1080p without changing my Desktop resolution. The only way to do this in the game setting is “fullscreen”. But then i have a really bad lag when alt tabbing.
    There are other programs/games out there where 1080p borderless works (e.g. Goddall, PES2021) which smoothly tab out to desktop and back.
    Is there any workaround/patch planned for Chiv2?