Playback - Nikon Z 8 Reference Manual

Playback

Press the K button to view photos and videos in the monitor or
viewfinder after shooting.
Press 4 or 2 or flick left or right to view additional pictures.
Videos are indicated by a 1 icon at the top left corner of the
display. Tap the a icon in the display or press the J button to
start playback.
To end playback and return to shooting mode, press the shutter-release button halfway.
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Playback