Adding a Channel to the Channel Bank
Locate the layer and bank on the faders where you want to place a channel. Press the "LCD Function" button on the top left of the fader set you are assigning to, then when the screens above the faders change color, press the triangle button below the screen that reads "Assign Faders". Now press the triangle button above the fader you want to assign a channel to, find the channel in the channel list on the center screen and tap on it.