Bu sadece RS6'da mı oluyor ? onu kontrol et.
(Alıntıdır)
Close the game, open C:\Users\<username>\Documents\My Games\Rainbow Six - Siege\<bunch of random char. folder>\gamesettings.ini
Set these values manually:
Monitor=0 (Monitor=0 if it's "monitor 1" or Monitor=1 if it's "monitor 2" according to windows display adapters)
RefreshRate=144.000000 (Mine is 144hz, set your native refresh rate if it's different than mine.)
WindowMode=0
AspectRatio=0
Save file and launch the game.
I had the same issue and this is what I did to fix it.
If it doesnt fix, delete gamesettings.ini, launch the game, let it auto-detect the configuration. Close the game and repeat the above.
Olmaz ise window=0 yerini 2 yap.