Footnotes
I noticed, while looking at a couple of reference EPUB books in the Calibre e-book reader, that when I clicked on a footnote, instead of going to the link in the main viewing window, it opened a box at the bottom of the viewer. I thought this was a neat trick, but when I checked out the stylesheet, I didn't see anything unusual to do this. Anyone know how to do this? I'd like to incorporate the technique in some of my own EPUBs.
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