If you haven't played around with the ability to edit series names, it can lead to some pretty neat things.
I now have a layout saved with my preferred Bible (I use the ESV) and my three favorite commentaries on each book. By creating three new unique series names, whenever I jump to any location in the Bible, my favorite top 3 commentaries on that particular book open up in adjacent windows. For example, if I'm in the book of John, PNTC opens in the first commentary window, St. Andrews in the second, and BECNT in the third. If I jump to Joshua, Dale Ralph Davis opens in the first, NAC in the second, and Boice in the third window. Jumping to Psalms opens the appropriate volume of The Treasury of David. Type in Luke, and BECNT, NIGTC, and NAC open up to the right verse.
Since I have favorites from different series, and don't use any one series exclusively, the ability to make my own series means I have a custom commentary set.
Nice feature!