OrganTEQ2 Separate Manuals set-up question

Hello all, I am just setting up so that I can play through the  software to the Rodgers digital 2 manual organ. No problem with the midi interface. On the software, how do you separate the manuals?  at the moment everything plays on everything (including
Pedals on the manuals). I’m sure I’m missing something elementary, yet essential! Thanks for any help you may have!