Nikon D4S - Manual (Page 396)

374
U
View the current camera firmware version.
D
AF Tuning
The camera may be unable to focus at minimum range or at infinity
when AF tuning is applied.
D
Live View
Tuning is not applied to autofocus during live view ( 0 52).
A
Saved Value
Only one value can be stored for each type of lens. If a teleconverter is
used, separate values can be stored for each combination of lens and
teleconverter.
Firmware Version
G button
➜ B setup menu