Toyota Prius C 2011 Owner's Manual page 212

*
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.
3-1. Using the air conditioning system and defogger
Air flows to the upper body and
feet.
Air flows mainly to the feet.
*: When the warming function is
operating, air flows to the upper
body as well to warm the upper
body effectively.
*
Air flows to the feet and the
windshield defogger operates.
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