Nikon Z 5 Reference Manual page 170

D
[Filter Effects]
Choose from the following [Filter effects]:
Option
[Y] (yellow)
[O] (orange)
*
[R] (red)
[G] (green)
* The term in parentheses is the name of the corresponding third-party
color filter for black-and-white photography.
Still Images
128
*
These options enhance contrast and can be used to
tone down the brightness of the sky in landscape
*
photographs. Orange [O] produces more contrast
than yellow [Y], red [R] more contrast than orange.
Green softens skin tones. Use for portraits and the
*
like.
Description