I have several Visio diagrams describing our processes (in Visio Professional 2010). Some of the diagrams reference other processes. In Visio, I'm able to add multiple hyperlinks to a shape. I needed to save our Visio diagrams as PDF for others in the company to view. For the most part, this worked great. In the cases where a shape had multiple hyperlinks, though, only the first hyperlink was preserved. Is there a way to preserve all hyperlinks associated with a shape when saving as a PDF file?
I stumbled upon the same problem. You could try to add a mouseover effect in the PDF, as described here:
I don't have acrobat to try it, but maybe you could add some hyperlinks to this optionally displayed layer(s)