Nikon Z 9 Reference Manual page 100

Operation
Zoom in
Adjust volume
Edit video
Exit
Resume shooting
Playback
100
Press X to zoom in on the current frame while
playback is paused.
Press X to increase volume, W ( Q ) to decrease.
To display video i menu, pause playback and
press the i button.
Press 1 or K to exit to full-frame playback.
Press the shutter-release button halfway to return
to shooting mode.
Description