The CONTROLS view also gives you access to the MIDI Program Change panel where you can assign any Hammond B-3X preset to MIDI Program Change numbers 0 to 127. You can assign the same preset to multiple MIDI PC numbers to organize your live performance preset changes any way you want.
Click the gear icon to open the SETTINGS panel where you can set the MIDI channel for the 3 manuals and program change messages. Here you can also adjust the tuning, transpose and pitch bend settings as well as your Audio/MIDI assignments.