DeltaOne and Jlcboston,
I wondered what that barely visible icon did. I'm going to be using that the next time I drive! Thank you!
I noticed today that this icon (the one with the arrow) has two modes. Before pressing the icon the audio screen can be full screen or one line at the bottom. Once you press the icon it's appearance slightly changes and it can be full screen or mid-screen. To return to one line at the bottom you have to press the icon again.