Nikon D780 DSLR Camera (Body Only) - Manual (Page 178)

132 Shooting Settings
A Choosing the Image Area via Buttons and Command Dials
If [ Choose image area ] has been assigned to a button using Custom
Setting f3 [ Custom controls ], the image area can be selected by pressing
the button and rotating a command dial.
• The selected crop is displayed in the viewfinder ( 0 130).
• The option currently selected for image area
can be displayed in the control panel and
viewfinder by pressing the button to which
[
Choose image area ] is assigned.
• Camera controls cannot be used to select image area when a DX lens is
attached and [
Auto DX crop ] is on.
A Image Size
Image size varies with the option selected for image area.
Image area Display
[ FX (36×24) ]
[ DX (24Ч16) ]
[ 1 : 1 (24Ч24) ]
[ 16 : 9 (36Ч20) ]