Shortcut to open PDF in Acrobat (or Preview)?

I actually like the way PDFs can now be viewed inside of Zotero, especially for annotating them or marking passages.

However, every now and then it would be useful to have a direct shortcut to open a PDF in the default viewing app (normally Acrobat or Preview on a Mac). Currently, the only way to do this seems to first locate the file from and then open it.

Could we have another direct shortcut to open a PDF in the default viewer?
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