Panasonic Lumix DC-G9 Operating Instructions For Advanced Features page 207

9. Using Menu Functions
> [Custom] >
MENU
[ISO Increments]
You can adjust the ISO sensitivity settings for every 1/3 EV.
Settings: [1/3 EV]/[1 EV]
[Extended ISO]
ISO sensitivity can be set up to minimum [ISO100].
[Exposure Comp. Reset]
An exposure value can be reset when the Recording Mode is changed or the camera is
turned off.
> [Custom] >
MENU
[AF/AE Lock Hold]
When [ON] is selected, focus and exposure stays locked even if you press and release
[AF/AE LOCK].
To clear the lock, press [AF/AE LOCK] again.
[Shutter AF]
Set whether or not the focus is adjusted automatically when the shutter button is pressed
halfway.
[Half Press Release]
The shutter will immediately fire when the shutter button is pressed halfway.
[Exposure]
[Focus / Release Shutter]
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