Nikon Z8 User Manual page 634

a2: AF-S Priority Selection
Choose whether photos can be taken before the camera focuses when AF-S is selected.
Option
Photos can be taken whenever the shutter-release button is pressed (release
[Release]
G
priority).
[Focus] Photos can be taken only when the camera is in focus (focus priority).
F
G button U A Custom Settings menu
Description
560
a2: AF-S Priority Selection