On my 16:9 display I have in-game available only 16:9 resolutions, but no other from other aspect ratio. Game is missing any aspect ratio switch so I cannot access others.
I am running 3840x2160 and I would like to use my custom-made resolution 3840x1646 (21:9). It is a problem only in DayZ, even some very old games recognize and allow me to set this resolution. The game should show other aspect ratio resolutions anyway.
I also tried to edit the config file directly, setting the WindowHeight to 1646 in DayZ.cfg, however even if I made the file read-only game was running 3840x2160 when I launched the game again (it was the last resolution I have set geme into in-game).