Version: SeeMusic 4.7.2, Windows 2.2 GHz, 16 GB RAM.
The current version only allows one Label Key per piece.
It would be good if we are able to include multiple entries of label keys by bar number. Some music pieces have variety of keys which introduce flats and sharps accidentals the same pitched notes. With this multiple keys feature, it would allow the notes (especially black keys) to be labelled more accurately by the timeline.