Remind Me How to Set this Up Please

Hello all,

Many years ago I set up my Touch 'Now Playing' display to turn off after say 15 sec when playing a song.

Well suddenly it has stopped doing this and simply shows the 'Now Playing' screen as usual ie without turning off.

I have played around with settings on the touch but I can't remember how I did it?

Can somebody help me?

P.s. I tried the 'Display Off' plugin but it didn't really do anything.