To show selected notes on the "piano" control
When I select some note (including notes that are part of some chord) in editor, I would like to see the corresponding note/pitch on the standard MuseScore editor piano control. If the note is included into some chord, then other chord tones could be highlighted as well, but with some other color (for example, the selected note us blue and the other chord tones are grey).
When you are in some key with a lot of sharps/flats, this feature would be very useful - you would see the exact pitch or the whole chord without having to check all those alterations and accidentals. Also very useful when a note is situated on the "added" lines (like A#3 in concert clef, etc.)