Ford 2002 F-150 Owner's Manual page 120

Seating and Safety Restraints
2. Pull control to release seat.
3. Pull seatback toward front seat
and down into load floor position.
4. Make sure seat is pushed all the
way down and locks into position.
Returning the seat to seating position
Always be sure that the seat is in a latched position, whether the
seat is occupied or empty. If not latched, the seat may cause
injury during a sudden stop.
120