In a text box, sometimes you could want to add more complete and complex comments referring to chords, scales and such using symbols. For example, you may want to include the same ones you use for the chord diagrams, i.e. solidd and hollow squares, triangles etc. You may also want to include chord symbols like a triangle to denote a Maj7, and so). An extra option could be possibly remembering the ones you most recently used.
Regards and keep up the excellent work!