Nikon D780 - The W ( y ) Button; Choosing a Metering Option

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Camera Controls
Use the
W
(
Y
) button to choose how the camera meters light
when setting exposure.
D
The
W
(
Y
) Button
The
W
(
Y
) button may be disabled in some shooting modes or when
certain conditions apply.
Choosing a Metering Option
Hold the
W
(
Y
) button and rotate the main command dial.
The
W
(
Y
) Button