Panasonic Lumix DMC-LX100 Owner's Manual page 175

Changing the zoom operation settings
→ [Custom] → [Zoom lever]
→ [Custom] → [Control Ring]
Zoom
Step Zoom
Retaining the zoom position when the camera is turned off
→ [Custom] → [Zoom Resume] → [ON] / [OFF]
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The zoom operates in the normal way.
Each time zoom is operated, the zoom stops at the position for
one of the preset focal lengths.
Stabilizer, Zoom and Flash
Using Zoom
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