Adjusting my screen sleep time

[Android Central Question]

Hi I would like to lengthen my screen awake to I'm but the function is there but not usable can anyone pls advise thanks in advance...

 

[ashune]

What do you mean by "not usable"? Is it disabled/unadjustable or does it simply not prolong/shorten the screen sleep time? If you toggle the screen sleep time/timeout in the notification panel, try adjusting it in Settings > Screen > Screen timeout (this may be called different on your phone).