Nikon D40 Guide User 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.
Choose a combination of aperture and shutter
speed (flexible program, mode P;_ 40).
Choose a shutter speed (modes Sand M;_ 41,43).
Set aperture (mode A;_ 42).
Set aperture (mode M; _ 43).
N 47).
Choose a flash mode a ..... ,_., _, [], P,S,A, and
+
_ Set flash compensation (_ S, A, and M modes;
+ _ 48).
Shooting mode
Image quality/size
ISO sensitivity
White balance
Technical N 0tes/Appendix 115