Nikon D800 User Manual (en)

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❚❚Fn button + command dials
Selecting Fn button + command dials displays the following 
options:
Option
Description
i
Choose image 
area
Press the Fn button and 
rotate a command dial to 
choose from pre-selected 
image areas (
Selecting Choose image 
area
 displays a list of 
image areas; highlight 
options and press the multi selector right to select 
or deselect, then highlight Done and press 
J.
$
Shutter speed 
& aperture lock
Press the Fn button and rotate the main command 
dial to lock shutter speed in modes f and h; press 
the Fn button and rotate the sub-command dial to 
lock aperture in modes g and h. See page 126 for 
more information.
v
1 step spd/
aperture
If the Fn button is pressed when the command dials 
are rotated, changes to shutter speed (exposure 
modes f and h) and aperture (exposure modes g 
and h) are made in increments of 1 EV, regardless of 
the option selected for Custom Setting b2 (EV 
steps for exposure cntrl
w
Choose non-
CPU lens 
number
Press the Fn button and rotate a command dial to 
choose a lens number specified using the Non-CPU 
lens data
 option (
y
Active 
D-Lighting
Press the Fn button and rotate the command dials 
to adjust Active D-Lighting (
None
No operation is performed when the command 
dials are rotated while the Fn button is pressed.