2012 Toyota Prius Owners Manual - Page 551

3-1. Using the air conditioning system and defogger Switching between outside air and recirculated air modes Press . The mode switches between outside air mode (the indicator is off) and recirculated air mode (the indicator is on) each time the button is pressed. Adjusting the position of and opening and closing the air outlets Center outlets Direct air flow to the left or right, up or down. Right and left side outlets Direct air flow to the left or right, up or down. 240