Nikon D800 User Manual (en)

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U
This option controls the operation of the main and sub-command 
dials.
f9: Customize Command Dials
G button
➜ A Custom Settings menu
Option
Description
Reverse 
rotation
Reverse the direction of rotation of the 
command dials when they are used to 
make adjustments to Exposure 
compensation
 and/or Shutter speed/
aperture
. Highlight options and press 
the multi selector right to select or 
deselect, then highlight Done and 
press 
J. This setting also applies to the command dials for 
optional MB-D12 multi-power battery packs.
Change 
main/sub
If Off is selected, the main command 
dial controls shutter speed and the sub-
command dial controls aperture. If On 
is selected, the main command dial will 
control aperture and the sub-command 
dial shutter speed. If On (Mode A) is 
selected, the main command dial will 
be used to set aperture in exposure mode g only. This setting 
also applies to the command dials for the MB-D12.
Aperture 
setting
If Sub-command dial is selected, aperture can only be 
adjusted with the sub-command dial (or with the main 
command dial if On is selected for Change main/sub). If 
Aperture ring is selected, aperture can only be adjusted with 
the lens aperture ring and the camera aperture display will 
show aperture in increments of 1 EV (aperture for type G lenses 
is still set using the sub-command dial). Note that regardless of 
the setting chosen, the aperture ring must be used to adjust 
aperture when a non-CPU lens is attached.