+ In any mode, <kbd class="mod3 mouse">left</kbd>-clicking on a note on the
+ Scroomer (the piano header of the track, see <a
+ href="@@midi-track-controls">MIDI Track Controls</a>) will add all
+ occurrences of that note to the selection, while <kbd
+ class="mouse">middle</kbd>-clicking will only select/deselect all occurrences
+ of that note, clearing the previous selection. Scroomer selections work on
+ all MIDI regions of a track at once.