Nikon D3S User Manual page 108

The Fn Button
The image area can be selected
by pressing the Fn button and
rotating the main or sub-
command dial until the desired
crop is displayed in the viewfinder
(0 80). This operation can not be
performed during live view or
while a multiple exposure is being
recorded.
The option currently selected for
image area can be viewed by pressing the Fn
button to display the image area in the top
d
control panel or information display. FX
format is displayed as "36×24", 1.2 × as
"30×20", DX format as "24×16", and 5 : 4 as
"30 × 24".
D
Auto DX Crop
The Fn button can not be used to select image area when a DX lens is
attached and Auto DX crop is on.
A
The Fn, Pv, and AE-L/AF-L Buttons
Changes to image area settings can be made using the Fn button
(Custom Setting f4, Assign Fn button; 0 316), the Pv button (Custom
setting f5, Assign preview button; 0 321), or the AE-L/AF-L button
(Custom Setting f6, Assign AE-L/AF-L button; 0 321). Note that some
"button press" options can not be combined with options using
"+command dials. "
A
Image Size
Image size varies with the option selected for image area.
82
Fn button
command dial
Main