How to add MIDI Note to custom percussion map?

Dear advanced users,

I could not find a way to add MIDI notes into Drum Kit Note Map.
How to do it?
Sorry if I missed something in the forum.

Best regards,
prko

Click ‘Show all’ in the action bar, which will show all of the MIDI notes, rather than only the ones that already have a mapping.

Ah, thanks!
“Show all” is also a button!