Nikon D810 - Manual (Page 287)

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Selected JPEG images can be printed on a PictBridge printer
(0 485) connected directly to the camera.
Connecting the Printer
Connect the camera using the supplied USB cable. Do not use
force or attempt to insert the connectors at an angle.
When the camera and printer are turned on, a welcome screen
will be displayed in the monitor, followed by a PictBridge
playback display.
Printing Photographs
D
USB Hubs
Connect the camera directly to the printer; do not connect the cable
via a USB hub.
D
Selecting Photographs for Printing
Images created at image quality settings of NEF (RAW) or TIFF (RGB)
(0 79) can not be selected for printing. JPEG copies of NEF (RAW)
images can be created using the NEF (RAW) processing option in the
retouch menu (0 399).
A
Printing Via Direct USB Connection
Be sure the battery is fully charged or use an optional AC adapter and
power connector. When taking photographs to be printed via direct
USB connection, set Color space to sRGB (0 296).