Now that Dano has turned me on to the proper use of Actions, it would be nice if once a global Action is executed you could identify which tags were changed via the use of a different color text.
I do all my edits in a specific folder, I then open Mp3tag to that folder, use Ctrl-A to select all tags and click on the Actions icon. Mp3tag does its magic and when finished it informs me, via a pop-up window, that it did X amount of renames.
Great! But it would be nice if I could identify via a different color text (across the whole tag, not the actual letter/symbol changed) what songs/tags were modified.
I hope that I explained myself correctly and I'm not suggesting something that's already been done or in the pipe-line...