Nikon D500 - Manual (Page 169)

169 Menu Guide
This option is used to correct “red-eye” caused by the flash, and
is available only with photographs taken using the flash. Note
that red-eye correction may not always produce the expected
results and may in very rare circumstances be applied to
portions of the image that are not affected by red-eye; check the
preview thoroughly before proceeding.
Create a straightened copy of the
selected image. Press
2 to rotate the
image clockwise by up to five degrees in
increments of approximately 0.25
degrees,
4 to rotate it counterclockwise
(the effect can be previewed in the edit
display; note that edges of the image will
be trimmed to create a square copy). Press
J to save the
retouched copy.
Red-Eye Correction
G button
➜ N retouch menu
Straighten
G button
➜ N retouch menu