In another thread:
To give the user the option of grouping songs by albums in regular playlists (it exists only for smart playlists as far as I can see).
You can sort regular playlists by any column. You can click on columns to sort by them. Or you can go to the playlist name in the header, click, and choose from the Sort By menu. Note that Sort By has a Custom section where you can specify any field, even if it's not shown.
Once a list is sorted, you'll notice that the sequence numbers on the left are now out of order. That's because you'd just sorted it; not reordered it's play order. If you want to make the current sorted state into the play order, click on the playlist name in the header and choose Update Order. Now the play order will match the sort order.
To add 2 more "recently used function" buttons when right clicking? I'm using this a lot when tagging and would like that the software remembers the last 3 different actions!
You can choose to have 2, 3, 4, or more Recently used functions in the right click menu. Set the options here:
Tools > Options > Tree & View > Advanced > Right click recent command count > (choose number)
I hope this helps you.
Brian.