Allow for copying citation (ctrl-c, or other shortcut) when viewing a pdf


I often want to copy the citation from a pdf file (viewed through paperpile), to paste that to somewhere else. Now I have to go back to the, find the entry for the pdf I had open, and then I can ctrl-c the citation.

I would like a shortcut key that allows me to avoid having to go through that loop, and just directly copy the citation from a pdf I have open. I realize ctrl-c is already taken, but maybe if you have nothing selected, ctrl-c can default to copying the citation?