Toyota Avalon 2008 Quick Reference Manual page 207

3-1. Using the air conditioning system and defogger
Adjusting the position of and opening and closing the air outlets
Center outlets
Side outlets
Rear seat outlets
182
Turn the knob to open or close
the vent
Direct air flow to the left or
right
Turn the knob to open or close
the vent
Direct air flow to the left or
right
Turn the knob to open or close
the vent
Direct air flow to the left or
right