Panasonic Lumix S9 Owner's Manual page 165

Focus / Zoom – Selecting the AF Mode

When [
If even part of a subject to be recorded enters the AF area, it is
automatically detected and focused.
•
If eyes are detected inside the AF area, eye detection (B) works.
It is not possible to change the eye to focus on.
(B)
], [ ], [ ], [ ], or [ ]
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