Nikon D300 User Manual page 42

Exposure
Press the I button and rotate the main command dial to choose
the exposure mode.
X
Choose the
exposure mode
(pg. 102)
Use the command dials to adjust exposure.
Choose a
combination of
aperture and
shutter speed
(exposure mode
P; pg. 105)
Choose a shutter
speed (exposure
mode S or M; pp.
106, 110)
Choose an
aperture
(exposure
mode A or M;
pp. 107, 110)
16
+
I button
Main command dial
+
Exposure
mode e
command dial
+
Exposure
mode f or h
command dial
+
Exposure Sub-command
mode g or h
Main
Main
dial
Control panel
Control panel
Control panel
Control panel