Nikon D780 Reference Manual page 366

•
To enable or disable exposure smoothing:
Highlight [Exposure
smoothing] and press 2 .
- Select [On] to smooth changes in exposure for natural-
looking footage.
•
To enable or disable silent photography:
Highlight [Silent
photography] and press 2 .
- If [On] is selected, the only time the sound of the shutter
or mirror will be heard is when the mirror is raised or
lowered at the start and end of shooting.
320 Other Shooting Options
Highlight an option and
press J .
Highlight an option and
press J .