How to add Play All to tool bar?

i have networked my music folder to my HTPC, but i'd like to open the folder, too see what tunes are in it, then press play all.

i know it's there on the previous window (My Music) but i'd like it have it in the open music folder.

it also appears on my main PC, but not on my HTPC???




cheers

got it, i had to right click a clear space in the folder, properties, customize and change it to music, plus add to all sub folders