Nikon NIKKOR Z 24-120mm f/4 S Reference Manual page 8

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3
Zoom ring
Rotate the ring to zoom in or out.
4
Focal length scale
Determine the approximate focal length when zooming the lens in or out.
5
Focal length mark
Determine the approximate focal length when zooming the lens in or out.
6
Control ring
Rotate to adjust a setting such as [Aperture] or [Exposure compensation]
assigned using the camera. For more information, see the description of
[Custom control assignment], [Custom controls], or [Custom controls
(shooting)] in the documentation provided with the camera.
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8
Parts of the Lens: Names and Functions