I don't know how to keep the Audio screen on the LCD constantly in view, but you don't need to in order to operate the IPod.
Once the IPod is connected and running, simply tap the right button on the four button selector and you go to the next song. The left button will take you to the previous song.
The Up button raises volume, the down button lowers the volume.
Holding the right button brings you to the next playlist. Holding the left button, the previous playlist. For some reason, when you change the playlist, you lose the shuffle feature until you reinitiate the shuffle from the Ipod itself.
Holding the down button silences the IPod and radio. The CB and Intercom will come through, they have separate "off" functions, but if you have GPS connected, the GPS sounds are silenced.
Hope this helps.