Exclude channels from Master

Is there a way on the ION console to exclude channels from the Master fader?  Our church just moved and we now have DMX control (vs. manual) of the house lights.  I'd like to have the Master to control everything but the house.  I already have house set up as a submaster attached to a fader on the fader wind.  If I can set up the stage lighting as another submaster to function like a grand master excluding house that would be just as good.

 

Thanks.

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