Nikon P340 - Manual (Page 169)

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Noise Reduction Filter
Set the strength of the noise reduction function that is normally performed
when saving images.
Rotate the mode dial to A, B, C, D or i M d button M A, B, C, D or
i tab (A9) M Noise reduction filter
Option Description
e
High
Performs noise reduction at a level higher than the
standard strength.
M
Normal
(default setting)
Performs noise reduction at the standard strength.
l Low
Performs noise reduction at a level lower than the
standard strength.