It is, because if you look at your touch screen controls and it's in another mode, you need to think about how you get out and back to radio. When there's a bu

It is, because if you look at your touch screen controls and it's in another mode, you need to think about how you get out and back to radio. When there's a button that says 'Radio' on it that never moves, you don't need to look _or_ think.