Nikon D4 - Manual (Page 360)

334
U
Choose the role played by the Fn
button for vertical shooting, either
by itself (Press) or when used in
combination with the command
dials (Press + command dials). The
options available are the same as for
Assign Fn button (
0 328), except that AF-ON is not available for
Press and that Press + command dials has additional ISO
sensitivity, Exposure mode, Exposure compensation, and
Metering options that allow the Fn button for vertical shooting
and command dials to be used to select ISO sensitivity (
0 117),
exposure mode ( 0 125), exposure compensation (0 137), or
metering ( 0 123), respectively. The default options for Press and
Press + command dials are respectively AE/AF lock and None.
Selecting On for Shutter speed lock locks
shutter speed at the value currently selected
in mode f or h. Selecting On for Aperture
lock locks aperture at the value currently
selected in mode g or h. Shutter speed and
aperture lock are not available in mode e.
f7: Assign Fn Button (Vert.)
G button
➜ A Custom Settings menu
f8: Shutter Spd & Aperture Lock
G button ➜ A Custom Settings menu