F2: Multi Selector; F3: Photo Info/Playback; F4: Assign Func. Button - Nikon D3 User Manual

f2: Multi Selector

If [Reset meter-off delay] is selected, operating the multi selector
when the exposure meters are off (pg. 50) will activate the
exposure meters. If [Do nothing] (the default option) is selected,
the exposure meters will not be activated when the multi selector
is pressed.

f3: Photo Info/Playback

At the default setting of [Info13/Playback42], pressing 1 or 3
in full-frame playback changes the photo information displayed,
while pressing 4 or 2 displays additional images. To reverse the
role of the multi selector buttons so that pressing 1 or 3 displays
additional images and pressing 4 or 2 changes the photo
information displayed, select [Info42/Playback13].

f4: Assign FUNC. Button

Choose the role played by the Fn button,
either by itself ([FUNC. button press]) or
when used in combination with the
command dials ([FUNC. button+dials]).
FUNC. Button Press
Selecting [FUNC. button press] for Custom Setting f4 displays the
following options:
Option
q
*
Preview
r
*
FV lock
Press the Fn button to preview depth of field
(pg. 117).
Press the Fn button to lock flash value (SB-800,
SB-600, SB-400, and SB-R200 flash units only,
pg. 201). Press again to cancel FV lock.
Description
U
331