Mazda 2009 MX-5 Miata Owner's Manual page 219

Interior Comfort
Climate Control System
Vent Operation
Button
qAdjusting the Vents
Directing airflow
You can direct air flow by rotating the vent.
Opening/closing vents
The two outside vents can be opened and closed with center button.
NOTE
When using the air conditioner, mist may come out from the vents. This is not a sign of trouble but a
result of humid air being suddenly cooled.
6-3