Setting the screen after logging out of the session

Greetings to you friends,
I am a newbie in using Zorin OS 16.1 and I have a request:
How and where to set the resolution for the screen that arises after logging out of the current session.
I have a 4K monitor and there are letters on it like tiny fleas.
Could someone please navigate me where to set it up?
Thank you very much in advance.
Kotelnik

This thread sadly might give you an answer but not a solution friend: