Ford 2008 F-150 Owner's Manual page 273

To put your vehicle in P (Park):
Come to a complete stop
Move the gearshift lever and securely latch it in P (Park)
Always set the parking brake fully and make sure the gearshift is
latched in P (Park). Turn the ignition to the LOCK position and
remove the key whenever you leave your vehicle.
R (Reverse)
With the gearshift lever in R (Reverse), the vehicle will move backward.
Always come to a complete stop before shifting into and out of R (Reverse).
N (Neutral)
With the gearshift lever in N (Neutral), the vehicle can be started and is
free to roll. Hold the brake pedal down while in this position.
D (Overdrive)
The normal driving position for the
best fuel economy. Transmission
operates in gears one through four.
Overdrive can be deactivated by pressing the transmission control switch
on the end of the gearshift lever (column-shift transmission) or on the
gearshift bezel (floor-shift transmission).
Column-shift transmission
2008 F-150
Owners Guide (post-2002-fmt)
USA
Driving
R N D 2 1
P
273