Nikon D780 DSLR Camera (Body Only) - Manual (Page 333)

287 Other Shooting Options
Use the [ Multiple exposure ] item in the photo shooting menu
to record two to ten NEF (RAW) exposures as a single
photograph.
Multiple Exposure Options
Combining Multiple Exposures in a
Single Photo (Multiple Exposure)
Option Description
[ Multiple
exposure
mode ]
• [ On (series) ]: Take a series of multiple exposures.
Select [ Off ] to resume normal shooting.
• [ On (single photo) ]: Take one multiple exposure.
• [ Off ]: Exit without creating additional multiple
exposures.
[ Number of
shots ]
Choose the number of exposures that will be combined
to form a single photograph.