Echo Touch Programming Faders

In an Echo Touch video Shawn Fernandez (ETC) remarked that you can control all house lights or certain stage lights from the Echo Touch with a fader.  How do I go about this?  ex.  I have 7 circuits of house lights but would like a single fader to control ALL  7.  Or a fader that has theatrical lights for a "rehearsal" look.  I understand using a Preset with sACN but don't understand how to make a fader control more than 1 device.  Thanks in  advance!

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