Panasonic Lumix DMC-GX7 Operating Instructions For Advanced Features page 165

Focus and Exposure Settings
Maintaining/not maintaining the lock when [AF/AE LOCK] is released
[MENU] > [Custom]>[AF/AE Lock Hold]>[ON]/[OFF]
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When AE lock is performed, the brightness of the recording screen that appears on the screen
is fixed.
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AF Lock only is effective when taking pictures in Manual Exposure Mode.
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AE Lock only is effective when taking pictures with Manual Focus.
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Only the AF lock is active during motion picture recording. Once you cancel the AF lock during
the recording, the AF lock cannot be reactivated.
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The exposure is set, even if the brightness of the subject changes.
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The subject can be focused again by pressing the shutter button halfway even when AE is
locked.
•
Programme Shift can be set even when AE is locked.
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