Nikon D780 DSLR Camera (Body Only) - Manual (Page 386)

340 Other Shooting Options
To enable the electronic shutter during live view photography,
muting the shutter and eliminating the vibrations it produces,
select [
On ] for [ Silent live view photography ] in the photo
shooting menu. Use for landscapes, still lifes, and other static
subjects.
• Use of a tripod is recommended.
• Enabling silent live view photography changes the frame
advance rates for continuous release modes (
0 178).
The Electronic Shutter (Silent Live View
Photography)