Nikon D780 DSLR Camera (Body Only) - Manual (Page 374)

328 Other Shooting Options
Use the [ Focus shift shooting ] item in the photo shooting
menu to vary focus automatically over a series of photographs.
This feature can be used to take photos that can later be copied
to a computer and combined using third-party focus-stacking
software.
Varying Focus over a Series of Photos
(Focus Shift Shooting)