Nikon D500 - Manual (Page 95)

95 Menu Guide
Choose the reference used to set exposure when a flash is used
with auto ISO sensitivity control.
If On is selected when the camera is used with an optional flash
unit that supports the Nikon Creative Lighting system, a
modeling flash will be emitted when the camera Pv button is
pressed. No modeling flash is emitted if Off is selected.
e4: Auto M ISO Sensitivity Control
G button
➜ A Custom Settings menu
Option Description
e
Subject and
background
The camera takes both the main subject and
background lighting into account when adjusting ISO
sensitivity.
f
Subject only
ISO sensitivity is adjusted only to ensure that the main
subject is correctly exposed.
e5: Modeling Flash
G button
➜ A Custom Settings menu