Edit > Preferences > Note input > Enable MIDI input vs. Toolbar > Toggle 'MIDI Input'
Those 2 don't seem to be connected to one another, the former does get saved in preferences, the latter looks always enabled after a fresh start, regadless of the former's setting, disabling it doesn't stick across a restart (not sure whether it should though).
Comments
Guess I found it in mscore/musescore.cpp, line 471:
where it should be:
See https://github.com/musescore/MuseScore/pull/5378
In reply to Guess I found it in mscore… by Jojo-Schmitz
PR had been merged , 232be92