Selecting a station and track using the touchpad
Swipe to the left or right over the 
button.
button. Radio: the previous or next station is set.
Media source: the previous or next track is selected.
or
To show the control menu:
press the button on the touchpad. or
Swipe upwards using two fingers on the touchpad.
The control menu appears for the audio source that was last selected.
Swipe left or right using one finger.
Radio: the previous or next station is set.
Media source: the previous or next track is selected.
To hide the control menu:
swipe down on the touchpad using two fingers.