Nikon D750 DSLR Camera (Body Only) - Manual (Page 441)

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Create copies that appear to have been
taken with a fisheye lens. Press
2 to
increase the effect (this also increases the
amount of that will be cropped out at the
edges of the image),
4 to reduce it. The
effect can be previewed in the edit
display. Press
J to save the retouched
copy.
Create an outline copy of a photograph
to use as a base for painting. The effect
can be previewed in the edit display.
Press
J to save the retouched copy.
Fisheye
G button
➜
N retouch menu
Color Outline
G button
➜
N retouch menu
Before After