To answer your first question, I don't know. That is why I have a tech coming back today. It appears he overloaded one side of my SWiM16. I can only use 2 tuners on my 34. He needs to move some tuners around. As for your second question, press info and move to the far right of the info bar. It gives you several options there. Then you use the down arrow to change tuners. Hope that helps.