FORD 2013 F-550 v.2 - Manual (Page 238)

Rear Camera Delay
Navigation display
When shifting the transmission out of R (Reverse) and into any gear
other than P (Park), the camera image remains in the display until the
vehicle speed reaches 5 mph (8 km/h). This occurs when the rear
camera delay feature is on, or until a radio button is selected.
Selectable settings for this feature are ON and OFF. The default setting
for the rear camera delay is OFF.
Rearview mirror display
When shifting out of R (Reverse) and into any other gear, the image in
the rearview mirror will remain on for a few seconds before it shuts off
to assist in parking or trailer hookup.
Parking Aids 237
2013 F-250/350/450/550 (f23)
Owners Guide gf, 2nd Printing, December 2012
USA (fus)