I love MP3Tag and swear by it, and this is possibly the one thing it's missing, for me.
I would love the ability to include the Numbering Wizard as a step in batch actions. An example of what I do... I often batch-edit large numbers of audiobook files, which I usually cut into 1:30:00 pieces. I like having the title as "Part X of Y". Currently, the only way to do it when tagging multiple directories at once, is
- Numbering Wizard → save total count, include leading zeroes
- My custom action → Format value of title as "Part %track%", Replace "/" in title with " of ".
- Numbering Wizard → untick save total count, 'cause I don't like that format
Which is three clicks if I have messages turned off. If I could include the Wizard steps in my custom action, it would be just one. (Yes, I'm a lazy person. )
eta: I'm comfortable with RegEx and scripting, but to my knowledge there's no way to accomplish that with either