How do you make it so one of the actions you create on the Actions menu expands into another sub-menu of sub-actions for that action? I used to do this. I had an elaborate action system set up (with lots of sub-actions) for my classical music collection, and now unfortunately it's gone and I have to rebuild it.
Artist --> Argerich, Martha
Barenboim, Daniel etc.
So if I wanted to define Evgeny Kissin as the artist for an album, I just clicked on the actions menu, moved my mouse over Artist, and then chose "Evgeny Kissin" from the secondary menu that pops up.
I've done lots of searching on here and on Google for how to define sub-actions (or whatever they might be called... action folders? submenus?), but have found nothing.