Using Nikon Coolpix P510 camera. When I try to crop an image I receive a message "image cannot be modified" Help would be appreciated.
It likely has to do with the image size that is selected. If you use those for 3:2, 16:9, or 1:1, most of the in-camera editing functions are not available. See manual page on "Picture Editing Functions." There is a footnote about the restrictions.