Nikon D800E User Manual page 64

Choose the role played by the Fn button during movie live view.
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Description _'-
Aperture widens while the button is pressed. Use in
Poweraperture combination with Custom Setting g2 (Assign
O (open) preview button) > Power aperture (close) for
button-controlled aperture adjustment.
Press the button during movie recording to add an
[] Index marking index at the current position (_ 63). Indices can be
used when viewing and editing movies.
Press the button to display information on shutter
View photo speed, aperture, and other photo settings in place of
11_6 shootinginfo movie recording information. Press again to return to
the movie recording display.
None Pressing the button has no effect.
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