Nikon Zfc Mirrorless Camera with 28mm Lens - Manual (Page 506)

FV lock
506
4
Focus.
Position the subject in the center of the frame and press the shutter-
release button halfway to focus.
5
Lock flash level.
･ After confirming that the flash-ready indicator ( c ) appears in the
shooting display, press the [FV lock] control; the flash unit will
emit a monitor pre-flash to determine the appropriate flash level.
･ Flash output will lock and an FV lock icon (
r
) will appear in the
shooting display.
6
Recompose the shot.