Honda Civic Coupe 1999 Owner's Manual page 90

Mode Control Dial
Use the MODE control dial to select
the vents the air flows from. Some
air will flow from the dashboard
vents in all modes.
Air flows from the center
and corner vents in the dashboard.
Air flow is divided between
the vents in the dashboard and the
floor vents.
Air flows from the floor
vents.
Air flow is divided between
the floor vents and the defroster
vents at the base of the windshield.
Air flows from the defroster
vents at the base of the windshield.
When you select
automatically switches to Fresh Air
mode and turns on the A/C.
the system
Heating and Cooling
Comfort and Convenience Features