How to change screen refresh rate?

Hi, I just installed Ubuntu Unity today. I’ve installed nVIDIA proprietary driver and I want to change my monitor refresh rate but I could not find settings to change it from 60 to 85Hz. Except in nvidia-settings application, I could. However, it won’t resist after logout/reboot.
Unity setting:
Screenshot from 2022-06-12 17-55-38
Screenshot from 2022-06-12 17-59-47

i work around this by pointing to a small .sh file with the startup applications:

xrandr --output eDP-1 --mode 2880x1800 --rate 60

Best to read about xrandr and play around with it before.