Thanks for the fast response Kirk! Much appreciated.
I think I was using the wrong term: Instead of the word Catalog, I meant Collections.
I have attached a snapshot of part of my Collections for clarity.
Take for example the Antarctica collection. In there I have several sub-collections. Some pictures could be in multiple sub-collections.
The problem is when I right-click on the picture and click on Catalog info it shows me the catalog indeed, which is: Catalog D-Drive.
The problem is that I can't see in which Collections the pictures are in.
It would be great if there is a similar button called "Collection info", but that seems to be missing.
So, it seems that it is impossible to know whether a picture is already in a certain collection unless you physically open the collection and look for that picture.
Maybe a feature that could be added to further updates?
Cheers,
Luke