Nikon D780 DSLR Camera (Body Only) - Manual (Page 343)

297 Other Shooting Options
Ending Multiple Exposures
To end a multiple exposure before the
specified number of exposures have
been taken, select [
Off ] for multiple
exposure mode or press the K button
followed by the i button and select
either [ Save and exit ] or [ Discard and
exit ]. If shooting ends or you select [ Save and exit ] before the
specified number of exposures have been taken, a multiple
exposure will be created from the exposures that have been
recorded to that point. If [
Average ] is selected for [ Overlay
mode ], gain will be adjusted to reflect the number of exposures
actually recorded. Note that shooting will end automatically if:
• A two-button reset is performed
• The camera is turned off
• The battery is exhausted