View PDF annotations as a separate file?

Is it possible to just open the notes one has created, i.e. to disconnect, or detach, them from the PDF? If yes, how?
Thanks in advance!

I don’t understand what you mean. You’re talking about notes and then PDF files. Do you mean that you have a PDF file and that you want to extract notes from the file?

Not in DEVONthink. The (free) PDF reader/annotation software Skim is, IMO, the best way to accomplish what you describe. There are a number of postings on this forum that explain different aspects of using Skim to extract annotations.