Why can't I duplicate a photo? "Duplicate" menu item is greyed out.
I've lost the ability to duplicate a photo on Photos. The "Duplicate" menu item is greyed out. How can I fix this? command-d does not work either. I am running latest OS 10.14.1 (18B75) and latest version of Photos Version 4.0 (3411.5.190). Thanks in advance for comments/suggestions.
iMac Line (2012 and Later)