Panasonic DMC-GH3KBODY Owner's Manual page 54

Preparation
[AFS/AFF]
[Quick AF]
•
The battery will be consumed faster than usual.
•
Press the shutter button halfway again when it is difficult to focus on the subject.
•
The [Quick AF] feature is disabled in the following conditions:
–
In Preview Mode
–
In low light situations
–
With lenses that only offer Manual Focus
–
With some Four Third lenses that do not support contrast AF
[Eye Sensor AF]
•
Refer to P67 for details.
[Pinpoint AF Time]
The [AFS/AFF] of the focus mode lever
either [AFS] or [AFF].
[AFS]/[AFF]
As long as the camera is held steady, the camera will
automatically adjust the focus and focus adjustment will then be
quicker when the shutter is pressed. This is useful when you do
not want to miss a picture-taking opportunity.
[ON]/[OFF]
[ON]/[OFF]
Sets the time for which the screen is enlarged when the shutter
button is pressed halfway with Auto Focus Mode set to [
[LONG] (Approx. 1.5 seconds)/[MID] (Approx. 1.0 seconds)/
[SHORT] (Approx. 0.5 seconds)
(P142) can be used for
].
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