Thanks so much guys. I didn't realise MM did half-stars, so now I'll drop the music player I was using, as I've found MMA a better fit for my tastes.

On the Now Playing screen in MMA, tap the Artwork and Rating should be revealed. You can also edit Rating in Properties of a file.

Swipe down for the track playing on my xperia i.e. Now Playing. Also use three dots and Customise Home Screen to enable the Rating tile. To be honest, I mostly rate in Media Monkey for Windows and then sync to Media Monkey Android 1.4.4.0952

I am running MMA 4 on my Samsung A 10. I have tried to rate the songs, but can't seem to find exactly where one finds the stars. I've tried the three dots in the right corner, and the ones bottom right. The lines bottom left. Yet nothing seems to pop up.
Am I going crazy? Thanks for any help.