Nikon D90 - Manual (Page 92)

72
h
The flash modes available depend on the mode currently selected with the mode
dial.
* SLOW is displayed after main M button is released.
i, k, n o
Auto Auto+Slow sync
Auto+
red-eye
reduction
Off Off
Auto+
Slow sync+
red-eye
reduction
P, A S, M
Fill flash Fill flash
Red-eye
reduction
Rear-
curtain+
slow sync * Red-eye
reduction
Rear-
curtain
sync
Slow sync+
red-eye
reduction
Slow sync