Honda 2007 Civic Hatchback Owner's Manual page 199

Climate Control System
Centre Vents
To adjust the airflow from each vent
in the centre and passenger's side,
move the tab in the centre of each
vent up-and-down and side-to-side.
196
Features
Passenger's Side Vent
The passenger's side vent can be
opened and closed with the dial
underneath it.