2011 Toyota Prius Owners Manual - Page 211

2-2. Instrument cluster Touch tracer display (if equipped) When the audio control switches, climate control switches, "DISP" switch or "TRIP" switch of the steering wheel are touched, the touch tracer display will appear in front of the gauges, with the touched switch highlighted to allow the driver to identify the switch that is being operated. The switch can then be operated by further presses. 2 When driving MPH or km/h button The speed units can be selected MPH or km/h. Press the button to switch the display between MPH and km/h. ITO22P107 185 PRIUS_U (OM47685U) DVD