2009 Toyota Prius Navigation Manual - Page 86

ADVANCED FUNCTIONS User selection INFORMATION During route guidance, the voice guidance continues even if the navigation screen is changed to other screens. "Adaptive Volume Control": By turning "Adaptive Volume Control" on, the volume is turned up automatically when the vehicle speed exceeds 50 mph (80 km/h). To turn the "Adaptive Volume Control" system on, touch the button. The indicator will be highlighted. The system can memorize the following settings for up to three users. D Map direction D Map scale D Map configuration D Guidance mode D Setup D Volume D Language D Route trace D Travel time/arrival time D Right screen of dual map D Road preference D Maintenance notification 84