Nikon D300 User Manual page 6

To choose the exposure mode, press the IVlODE
button and rotate the main command dial
until the desired mode is displayed in the
control panel or viewfinder.
MODE button
Main command
dial
[] Depth-of-Field Preview
To preview the effects of aperture, press and hold
the depth-of-field preview button. The lens will
be stopped down to the aperture value selected
by the camera (modes P and .5) or the value
chosen by the user (modes .q and !I), allowing
depth of field to be previewed in the viewfinder.
Preview button
[] Custom Setting e4--Modeling Flash
This setting controls whether the built-in flash and the SB-900, SB-800,
SB-600, SB-R200, and other optional flash units that support the Creative
Lighting System (CLS; see page 357) will emit a modeling flash when the
depth-of-field preview button is pressed. See page 297 for more
information.
[] See Also
See page 96 for information on auto ISO sensitivity control. For
information on using the [Long exp. NR] option in the shooting menu for
reducing noise at slow shutter speeds, see page 262. For information on
choosing the size of the increments available for shutter speed and
aperture, see Custom Setting b2 ([EV steps for exposure cntrl.], pg. 275).
For information on changing the roles of the main and sub-command
dials, see Custom Setting f7 ([Customize command dials] > [Change main/
sub], pg. 307).
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