A6: Af Activation; Out-Of-Focus Release - Nikon Z fc N2016 Reference Manual

･ Select [Yes] to enable separate focus-point selection.
Camera rotated 90° Landscape (wide) Camera rotated 90°
counter-clockwise orientation clockwise

a6: AF activation

G button U A Custom Settings menu
Choose whether the shutter-release button can be used to focus. If [AF-
ON only] is selected, the camera will not focus when the shutter-release
button is pressed halfway. Focus can only be adjusted using other
controls to which AF-ON has been assigned using Custom Setting f2
[Custom controls (shooting)].

Out-of-focus release

To choose whether the shutter can be released even in circumstances in
which it would normally be disabled, select Custom Setting a6 [AF
activation], highlight [AF-ON only], and press 2 . Selecting [Enable]
allows the shutter to be released at any time.
A Custom Settings: Fine-tuning camera settings
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