Screen Timeout on Android 11 Issue

[Triggz590]

I am trying to change the screen timeout setting on my S20 Ultra but it keeps reverting back to 20 seconds. 

I have tried to follow the guide on how to change this via other comments advising to go to Device Care - Battery - 3 dots - Settings. I no longer have the 3 dots when I go to device care and battery. 

Does anyone know how do this on Android 11 please? 

[ironass]

Go to... Settings > Display > Screen timeout... select, 15, 30 sec's, 1, 2, 5, 10 min's

[Triggz590]

I try that but it automatically returns to 20 seconds. so I tried to change the optimisation setting for screen time out and I can't find it. Do you know how to do that on Andriod 11?

[Alan-UK]

search for "build options" in settings. when found click it 5 times (this will add a new option at bottom of settings for developers)

There you should see an option to keep screen on when changing. Won't fix all your problems at will at least stop screen turning off while plugged in