Restrict note input to a diatonic key
If you’re working in a diatonic key (major, minor, or modal), using the Diatonic Input feature can help you quickly add notes. This feature restricts note input to the notes of the current key.)
Turn on Diatonic Input
Choose Edit > Diatonic Insert from the Score Editor menu bar.
Notes can be altered chromatically, after they have been inserted.
Note: If you protect (lock) your screensets, this function’s setting is also locked.