Nikon Z9 Mirrorless Camera - Manual (Page 432)

432 Flash Compensation
Flash compensation is used to deliberately alter flash output, for
example in order to change the brightness of the subject relative to the
background. Flash output can be increased to make the main subject
appear brighter, reduced to prevent glare, or otherwise fine-tuned to
produce the desired result.
Adjusting Flash Compensation
Hold the c button and rotate the sub-command dial.
• Choose from values of from −3 to +1 EV.
• At default settings, changes to flash output are made in increments of
1 /
3
EV. The size of the increment can be selected using Custom Setting
b2 [ EV steps for exposure cntrl ].
Flash Compensation