Please read the thread Sebastian linked to again.
QUOTE(Florian @ Aug 26 2005, 17:17)
I won't add additional static fields for tag fields, because there are so many of it.
If I start adding other fields, say the encoded by field, the next user will request
an input box for the lyrics or for composer or for performer or for the url to
the artis info and so on.
I added a post to anothe thread on this subject, not realizing that this thread existed. In that post, I asked for an enhancement so that I could specify additional tag field to be displayed in the left panel.
I added the tag fields I need to the view columns. I now edit tags for a group of files by selecting those files and then right clicking and choosing Tags from the context menu.
I understand that I can edit a tag value for a single file in the view column. However, that doesn't seem to be possible to select a group of files and edit a tag value in the view columns.
If MP3tag had no support for Composer, Conductor and similar extended fields, it would have no value for me. Right now it works but it is rather cumbersome for editing lots of files. Since I haven't found a way to get usable tag information from Freedb or an equivalent online database, ripping CDs requires lots of tag editing.
Since you seem to be unwilling to even consider enhancing your program to provide better support for extened tags, I'll use MP3tag for now and keep looking for a program that does the job right.