Chrysler 2008 Pacifica - Manual (Page 264)

Floor Mode
Air comes from the floor outlets. A slight amount of air is
directed through the defrost and side window demister
outlets.
Mix Mode
Air comes from the floor, defrost and side window
demist outlets. This mode is not used when operating in
either
ЉAUTO HIЉ or ЉAUTO LOЉ. This mode should be
used when airflow to the floor and windshield is desired.
Floor Outlets Mix Outlets
264 UNDERSTANDING YOUR INSTRUMENT PANEL