I have replaced my old Element I Light Board with a nice new Ion Xe20 board. But I can not figure out how to use the manual faders on the new board. The User Manual is of no help -- it only describes the procedure for using manual faders on the ELEMENT Board, and I already know how to do that. How do I select channels so that I can manually adjust intensity with the faders? What is the "Fader Page" button for? Where can I get a user manual to help me?