Acura 2007 RL Owner's Manual page 208

Climate Control System
Air flows from the center
and corner vents in the dashboard.
Airflow is divided between
the vents in the dashboard and the
floor vents.
Air flows from the floor
vents.
Airflow is divided between
the floor vents and defroster vents at
the base of the windshield.
202
When is selected, you can
increase or decrease the
temperature of airflow from the
dashboard vent for the driver's side
and the passenger's side without
changing the temperature of airflow
from the floor vent.
Push the interface selector right or
left, then turn the interface knob to
select the desired temperature.