Artist Pictures

[kenn1968]

This may be a total noob question, but I can't find any information on how to add artist pictures,
and both my player on the PC (Jamstach) and my Android Player (UltraSonic) looks like they support it....
I have the "mainfolder/artist/album/" file structure, and I'm using the new 4.9 version.

Thanks in advance

Kenn