I understand the limitation now and find it a pity. I am trying to eliminate duplicates. I run "Find Duplicates" and try to work with the generated list. I'd go through it one by one, adding the ones for Temp. Marker I do not want to retain. With that collection, I could run a batch delete at the end.
Will I have to resort to something like:
- display duplicate list
- "copy and delete" them to a temporary library
- work with that lib using Temporary Marker
- copy back the cleaned-up list to the original library