Work/Grouping fields (iTunes 12.5)

[ohrenkino]

@acidbearboy

...Would somebody please tell me how to create an ACTION that will copy all of the information currently saved in the GROUPING field into the WORK field in mp3tag. As far as I can see, they both link to the TIT1 field. Thanks

See the release note on Version 2.80c
Mp3tag v2.80 released
which tells you the field names in MP3tag.
Copying one field into another could also be achieved easily with the function
Convert>Tag-Tag