This sounds very much like the Tag "Action Window" (Alt+Enter).
Actually I told about Tag Action Window usage. It displays only small single line textbox but for some tags this is unacceptable.
When some tag contains long data (e.g. Comments or Lyrics), it's very inconvenient to read/edit it.
click on one...Is that better?
Unlike the comment field, when you click on lyric, note & description field in the action\tag window it will open a new window where you can edit large amounts of text.You might want to use the note field instead of the comments field. Or create a custom tag and make the Edit Type to Large Value.