Aston Martin One-77 2010 Owner's Manual page 92

If the brake pedal is not pressed the message
centre (right) will show PRESS BRAKE PEDAL and a
warning will sound.
The message centre (left) (A) shows the current gear
selection R, D1, D2, etc., while the Gear Position
Indicator Display (GPID) (B) shows D (drive), R
(reverse) or P (park) according to current gear position.
As vehicle speed reduces the SportShift system will
open and close the clutch and downshift as engine
speed drops to below 1,050 rpm in each gear.
5.6
Vehicle Rocking Motion
If the vehicle speed is less than 4 km/h, R (reverse) may
be selected from D (drive), without pressing the brake
pedal, to create a vehicle 'rocking' motion i.e. to
enable vehicle movement out of mud, snow, etc. If
4 km/h is exceeded then the transmission will
automatically select N (neutral).