Panasonic LUMIX DMC-GM1 Operating Instructions For Advanced Features page 156

6. Focus and Brightness (Exposure) Settings
•
AF Lock only is effective when taking pictures in Manual Exposure Mode.
•
AE Lock only is effective when taking pictures with Manual Focus.
• 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.
•
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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