I had to check on that. It appears that the Legacy config program doesn't allow you to designate Slave and Master speakers. Looks like that must be done when typing the speakers themselves.

System One: 861v2, 2x DSP6000 18 bit, DSP5000C 18 bit, M2500 System Two: 561, 2x DSP5000 18 bit Storage: 2x DSP6000 18 bit