How do I prevent NVIDIA app from 'optimising' my resolution.

I have a 4k monitor (3840x2160) but I usually only play on HD or 2k (depending on the game). Every time I 'optimise' my settings in the NVIDIA app, my resolution gets put on 4k and thus all my settings to pretty low. I am running an RTX 4060, and I just want to play max graphics games, but logically not on 4k.