Nikon D40 Owner's Manual page 127

The Command Dial
The command dial can be used in alone or in combination with other controls to adjust the
following settings. Changes to the affected setting are visible in the viewfinder and shoot-
ing information display.
Exposure
+
Flash settings
+
+
Fn button (available when the following options are selected for Custom Setting 11;
+
Choose a combination of aperture and shutter
speed (flexible program, mode P;
Choose a shutter speed (modes S and M;
Set aperture (mode A;
Set aperture (mode M;
Set exposure compensation (modes P, S, and A
47).
Choose a flash mode (
M modes; 34–36).
Set flash compensation (P, S, A, and M modes;
48).
Shooting mode
Image quality/size
ISO sensitivity
White balance
40).
41, 43).
42).
43).
, , , , , P, S, A, and
Technical Notes/Appendix 115
77)