I'd like a feature (which I believe is not present) allowing the referral to the tags of the first file in the selection.
The reason is that often the tags for classical music are written in this way:
Liszt: Beethoven Transcriptions, Symphony No.2 in D major, op.36 - I. Adagio molto - Allegro con brio
III. Scherzo Allegro - Trio - Scherzo da capo
IV. Allegro molto
The procedure to cut the "author/symphony" part, put it somewhere (I put it in the Album tag) and then select the files, and assign the same album to the other files, is long and repetitive.
If a placeholder like %title0% is allowed, it would be easy to build an action like:
Guess values. Source format: %title0% Guessing pattern: %artist%: %album% - %dummy%
This would set the same artist and album for all the selected files.
In my opinion this could be a nice feature, that would improve an already wonderful program. (Please let me spend one word about that: this is a very, very intelligent program: whatever is logical, even if hidden, is already in it... E.g. select a group of files/copy/select another group of files/paste -> the tags are copied onto them! Perfect for different versions of the same music! It is logical, and it is there! I really admire it!)