How can I change the graphics without entering the game? (Genshin Impact)

I have a weak computer, I play at minimum salaries for fun, I turned on high graphics settings for logalo, then I put it back on at least 2 minutes, the game of the driver, I re-enter the game and for some reason I have high looks in the menu, but in the general manager I can't change the graphics in the menu rebooted pereustonavlyuval does not work tell me if I play genshin through Epic Games