2010 Toyota Prius Owners Manual - Page 200

2-1. Driving procedures Changing shift ranges to "P" position Push the "P" position switch with the brake pedal pressed down. The "P" position icon is displayed on the instrument cluster, and the indicator on the "P" position switch comes on. You can only shift to other positions from "P" when the brake pedal is depressed. When parking, check that the "P" position icon is displayed on the instrument cluster, and release the brake pedal gently after applying the parking brake. ITO21P107