Dedicated Audio for Livestream

How do you get a dedicated audio feed for your livestream? Nearly all soundboards have AUXiliary sends (or outs) just for this purpose. See how you can setup your own AUX send for a dedicated livestream feed.
Alto Mixer: amzn.to/3LcFMi0

[@BryceAndEveeNZ]

add on ... if you are not paying atrention you cand f*** another setting ... either turning another channel up or down when you wanted to change the different channel. I got into double checking where my fingers were before adjusting when I was doing it for church (20 ish channels on any given sunday)