Nikon D780 DSLR Camera (Body Only) - Manual (Page 510)

464 On-Camera Flash Photography
• [ Distance-priority manual ]: Choose the distance to the
subject; flash output will be adjusted automatically. Flash
compensation is also available.
• [ Manual ]: Choose the flash level manually.
• [ Repeating flash ]: The flash fires repeatedly while the shutter
is open, producing a multiple-exposure effect. Choose the
flash level ([
Output ]), the maximum number of times the unit
fires ([ Times ]), and the number of times the flash fires per
second ([ Frequency ], measured in Hertz). The options
available for [ Times ] vary depending on the options selected
for [ Output ] and [ Frequency ]; see the documentation
provided with the flash unit for details.
D Unified Flash Control
Unified flash control allows the camera and flash unit to share settings. If a
flash unit that supports unified flash control is mounted on the camera,
changes to flash settings made with either the camera or flash unit are
reflected on both devices, as are changes made using optional Camera
Control Pro 2 software.