If you turn on the DSR function during the game, you will not be able to change the resolution to 4k

[deadl0cked]

If you turn on the DSR function during the game, you will not be able to change the resolution to 4k, because it will not be in the Resolution (Full Screen) points. It will work if the main monitor is set to 4k and native resolution is installed in the game. But with Native resolution, you can't change the brightness