Nikon D780 Reference Manual page 335

Option
•
[Overlay
shooting]
•
[Select first
Choose the first exposure from the NEF (RAW) images on
exposure
the memory card.
(NEF)]
[On]: Earlier exposures are superimposed on the view
through the lens during live view photography. The
earlier exposures aid composition of the next shot.
[Off]: Earlier exposures are not displayed while
shooting is in progress.
Description
Other Shooting Options
289