Nikon D780 DSLR Camera (Body Only) - Manual (Page 654)

608 Menu Guide > A Custom Settings
Choose whether the shutters on the remote cameras are
synchronized with the shutter on the master camera when
using an optional wireless remote controller.
In situations where the slightest camera movement can blur
pictures, shutter release can be delayed by from about 0.2 to 3
seconds after the mirror is raised.
d3: Sync. Release Mode Options
G button
U A Custom Settings menu
d4: Exposure Delay Mode
G button U A Custom Settings menu