Can I create an action that takes input from the user?

I want to write a simple action that simply appends some text to an ID3 tag. I would like to be able to have this action query me for the string to append as opposed to having to modify the action every time I want to change the string to append. Is there any way to do this?

Thank you!

No, unfortunately there is no way of doing this at the moment.

Thanks for letting me know, Florian. This is the first time there has been a capability I needed that mp3tag did not possess, showing how fantastic the tool is. Thank you very much for your efforts!