Nikon D780 DSLR Camera (Body Only) - Manual (Page 734)

688 Menu Guide > B The Setup Menu
Adjust status LED and link mode settings for optional WR-R10
wireless remote controllers. You can also choose a link mode for
connection to optional radio-controlled flash units that support
Advanced Wireless Lighting.
D The WR-R10 Wireless Remote Controller
Be sure the firmware for the WR-R10 has been updated to the latest
version (version 3.0 or later). For information on firmware updates, see the
Nikon website for your area.
LED Lamp
Enable or disable the status LEDs on a WR-R10 wireless remote
controller mounted on the camera. For more information, see
the documentation supplied with the wireless remote
controller.
Wireless Remote (WR) Options
G button
U B setup menu