FORD F-250 - Manual (Page 81)

Failure to follow these instructions will affect the performance of
the safety belts and increase the risk of personal injury.
Front safety belt height adjustment
Your vehicle has safety belt height adjustments for the driver and front
passenger. Adjust the height of the shoulder belt so the belt rests across
the middle of your shoulder.
• Regular Cab and 4–door CrewCab
Seating and safety restraints
81