Auto; Noise Reduction - Nikon D3200 Reference Manual

AUTO
If the mode dial is rotated to P,S,A, or M after Auto is selected for ISO sensitivity in another
mode, the ISO sensitivity last selected in P,$, A, or M mode will be restored. Note that if the
ISO sensitivity selected by the user is higher than the value selected for the ISO sensitivity
settings > Auto ISO sensitivity control > Maximum sensitivity option in the shooting
menu, the value selected for Maximum sensitivity (_ 129) will be used instead.
The Shooting Menu
ISO sensitivity can also be adjusted using the ISO sensitivity
settings option in the shooting menu (_ 127).
See Also
For information on enabling auto ISO sensitivity control in P,S,A, or M modes, see page 129.
For information on using the Noise reduction option in the shooting menu to reduce noise
at high ISO sensitivities, see page 131. For information on using the Fn button and the
command dial to select ISO sensitivity, see page 143.
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