What is white keyhole in place of a thumbnail in project's library browser view?
I have a small white-bordered keyhole in the position of one of the thumbnails in a project I am viewing in the library browser view. Originally it appeared with an orange flag which I have turned off. I don't even use the flag feature. What is this? I am unable to open it. The other thumbnails appear normally in this project.
Thanks for your help.
iMac 27"
