Nikon D810 - Manual (Page 431)

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Create a copy of a photograph that
resembles a sketch made with colored
pencils. Press 1 or 3 to highlight
Vividness or Outlines and press 4 or 2
to change. Vividness can be increased
to make colors more saturated, or
decreased for a washed-out,
monochromatic effect, while outlines can be made thicker or
thinner. Thicker outlines makes colors more saturated. The
results can be previewed in the edit display. Press J to save the
retouched copy.
Color Sketch
G
button ➜ N retouch menu