Panasonic Lumix DC-G100 Operating Instructions Manual page 213

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Setting the function of [AF/AE LOCK]
[ ] [
[AE LOCK]
[AF LOCK]
[AF/AE LOCK]
[AF-ON]
• Program Shift can be set even when AE is locked.
• You can maintain lock even without pressing and holding the Fn button:
[ ] [
8. Brightness (Exposure)/Coloring/Picture effect
] Select [AF/AE Lock]
The exposure is locked.
The focus is locked.
Both focus and exposure are locked.
Auto Focus is activated.
] [AF/AE Lock Hold] (333)
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