Venue Profile System
 

How can I set Master aux to postfader

Re: Venue Profile System
 

That question is a little vague. Aux Masters by default are post fader, by default as well aux sends are post fader. However if you want to make the channels pre, select the channel(s) and if the "Pre" button by the aux is selected, deselect it and the auxes will be post.

Is that the information you are looking for? If not, let me know a little more of the situation and what you are trying to do.