Nikon manual 1, 2

86
I
Rate pictures or mark them as candidates for later deletion. Rat-
ing is not available with protected images.
1Select a picture.
Display a picture in full-frame playback.
2Press 1(&).
Rating Pictures
Press 1(&) and rotate the multi
selector to choose from ratings of
zero to five stars, or select ) to mark
the picture as a candidate for later
deletion.