Nikon D500 - Manual (Page 326)

300
e2 Flash shutter speed (defaults to 1/60 s)
1/60 s Choose the slowest shutter available
when the flash is used in modes P and A.
1/30 s
1/15 s
1/8 s
1/4 s
1/2 s
1 s
2 s
4 s
8 s
15 s
30 s
e3 Exposure comp. for flash (defaults to Entire frame)
Entire frame Choose how the camera adjusts flash
level when exposure compensation is
used.
Background only
e4 Auto M ISO sensitivity control (defaults to Subject and background)
Subject and background Choose whether auto ISO sensitivity
control for flash photography is
adjusted to correctly expose both the
subject and background or the main
subject only.
Subject only
e5 Modeling flash (defaults to On)
On Choose whether optional CLS-
compatible flash units (
0 328) emit a
modeling flash when the camera
Pv
button is pressed during viewfinder
photography.
Off