Jensen VX7021 Operation Manual page 20

Illumination - Touch to access the Illumination color pallete. Touch a color to set
the front panel display to the selected color.
UI Color - Touch to select the user interface color. Touch again to confirm and set
the color.
Demo - Touch On / Off to turn the Demonstration Mode On or Off. The factory
default setting is On. This mode is useful when the unit is mounted in a display
for sales opportunities.