We intend to use the new pop up feature for footnotes in an ePub book that we're working on. One of the pop-up footnotes references an earlier page that carried a complete explanation of a specific term, and I would also like to provide a cross reference hyperlink for the reader. Is it possible to insert a cross reference within a pop-up footnote or will this really confuse matters? I could try it out, but I thought perhaps someone would know. Or maybe it's better to eliminate the footnote completely and just work with the cross reference hyperlink. The client is a bit old-fashioned and likes adding footnotes in the old time printed fashion and I hate to eliminate it. Thanks.