D: Shooting/Display; D1: Beep; D2: Viewfinder Grid Display; D3: Viewfinder Warning Display - Nikon D300S User Manual

d: Shooting/Display

d1: Beep

If High (high pitch) or Low (low pitch) is selected, a beep will sound
at the selected pitch while the self-timer is active or when the
camera focuses using single-servo AF. Note that a beep will not
sound when the camera focuses during movie recording or in
quiet-shutter release mode (mode J) or if Release is selected for
Custom Setting a2 (AF-S priority selection, 0 264).
c appears in the control panel and
information display when the beep is on.

d2: Viewfinder Grid Display

Choose On to display on-demand grid lines
in the viewfinder for reference when
composing photographs.

d3: Viewfinder Warning Display

Choose On to display a low battery icon (d)
in the viewfinder when the battery is low.
G button A Custom Settings menu
G button A Custom Settings menu
G button A Custom Settings menu
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