ain64_din128_dout128_v2... LCD menu stuff

Hi all.

Ref the application: ain64_din128_dout128_v2…

This might sound like stupid, but where is there a reference to the four lcd menu buttons: exec, right, left and snapshot?

If this app has no such buttons, does it mean that there are 128 buttons available for MIDI note-on offs?

Also  (unlike the MB64 app) I cannot locate any reference to the buttons - are they toggle types or what?

Any ideas or help greatly apprecated folks.

regards