I'm listening to a channel and want to go to another. I see the arrows at the top on each side of the channel logo. I click them. I'm taken to a screen with the channels on a scroll and a keypad. I can scroll to another channel or type the number in... But how do I go from that screen to the channel I want to go to? What is the purpose of this screen and what can I do with it? Do I really need to go back to the main screen and go through all those menus?