Where does Preview save a clone of a document? I have a document with a base64 name that I have hit shift command s to make a copy and then hit command s to save it.  The "*" in the title bar is gone now so it has been saved. But *where* ..  It is not in the same directory as the original file and it is not anywhere underneath my home directory.
I found out where it went to: it is from some prior "File Save" from a different application (not Preview!). It is not possible to re-specify - or even _see !_ - the directory when using the Duplicate functionality. Instead it is necessary to use the File | Rename.  That is a bug imo.