2012 Toyota Prius Owners Manual - Page 496

2-2. Instrument cluster Touch tracer display (vehicles with Display Audio system) When a steering wheel switch is touched, an illustration of the switch is shown on the screen, helping the driver to confirm which switch they are touching without needing to look down at their hands. The touch tracer display can be turned off. (→P. 197) If an audio/navigation system is used that is not compatible with the steering switches in this vehicle, the audio switch display may not operate correctly. Switching the display Press the "DISP" switch on the steering wheel to change the displayed item. The "TRIP" switch may also be used for certain items. 186