‘track’ autofocus is default- when a track is selected in live, the monome app on that track assumes control of the monome hardware.
‘plug-in’ autofocus is used if you have two or more monome applications on the same track. focus is applied when the plug-in itself is selected.
‘off’ turns off autofocus completely.
keep in mind, if you have autofocus set to ‘track’ and the app’s track number changes (either by inserting a track before it or moving the app to another track), u need to click the autofocus refresh button for it to recognize the new track number and still autofocus properly.