I'm certain this will have been asked before, and I'm certain that I'll be directed to a great thread that answers my question - but I have tried a search, but didn't uncover anything helpful.
So, how can I view and edit actions without any files in the main MP3Tag window?
Because it is the case that I’ll have my laptop with me, but not my external drive with my music library on, and in that situation, I can’t update any rules or actions in MP3Tag…
Maybe copy a few different files to a local "Test" folder? Ideally if you are creating new Actions you'd need something to confirm the results with. Plus this would be done in advance without affecting your actual library.