The PdfWriter.open_destination docs isn't parsed "right" and so looks a bit incorrect:

Looking at the other @property values, it doesn't seem like having a :param: though is the right way to go, and so should that be removed? I'd also want to eliminate 1-2 of the /OpenAction references as it feels very repetitive. Maybe something like:

        """
        Property to access the opening destination ("/OpenAction" entry in the
        PDF catalog). This can be set to either Destination, Page, or a string
        (NamedDest) to open to that destination, or None for no open
        destination.
        """

Happy to open the PR for this, but figure an issue is a better quick vehicle to get initial feedback on what's desired for the block.