A4: Focus Points Used; A4 [Focus Points Used] - Nikon Z 9 Reference Manual

a4: Focus Points Used

Choose the number of focus points available for manual focus-point
selection when an option other than [Auto-area AF] is selected for AF-
area mode.
Option
4
[All points]
[Alternating
5
points]
G button U A Custom Settings menu
Every focus point available in the current AF-area
mode can be selected. The number of points
available varies with the AF-area mode.
The number of available focus points is reduced to
one quarter of the number available when [All
points] is selected. Use for quick focus-point
selection. The number of points available for
[Pinpoint AF] is not affected.
A Custom Settings: Fine-Tuning Camera Settings
Description
601