Bel Canto Pre 3 Reciever Balanced input

The Bel Canto Pre 3 has inputs 1-5 and HTB but is missing the Bal (balanced) input.

Could this be added?

There is an INPUT PREVIOUS command. Does that get there? Also, is there a button for discrete access to that input that can be learned from your remote?

The previous works somewhat but can get out of synch

The remote doesn’t have discrete access both toggles through the presets 1=>2=>3=>4=>5=>Bal

I will try to learn the Bal command and am checking with Bel Canto to see if they have a discrete code for Bal