Nikon Z9 Mirrorless Camera - Manual (Page 423)

423 Using an On-Camera Flash
1
Mount a flash unit on the camera
accessory shoe.
See the documentation supplied with
each Speedlight for information on
mounting the unit on the camera.
2
Turn on the camera and flash unit.
The flash will begin charging; the flash-ready indicator ( c ) will
appear in the shooting display when charging is complete.
3
Choose the flash control mode ( 0 426) and flash mode ( 0 429).
4
Adjust shutter speed and aperture.
5
Take pictures.
Using an On-Camera Flash