Nikon Z9 Mirrorless Camera - Manual (Page 90)

90 Taking Photographs
4
To focus, press the shutter-release
button halfway (i.e., lightly press the
shutter-release button, stopping when
it is pressed halfway).
• The focus point will be displayed in
green when the camera focuses. If the
camera is unable to focus, the focus
point will flash red.
• The AF-assist illuminator may light to
assist the focus operation if the subject
is poorly lit.
• You can also focus by pressing the AF-ON button.
D The AF-Assist Illuminator
Do not obstruct the AF-assist illuminator while it is lit.