I have no idea if pop-up/hovering footnotes are ePub compliant or not, but using Sigil as the previewer wouldn't be the proper test even if it is. Check it with ADE or an ADE device.
I'm guessing what you're trying to accomplish is going to produce fairly hit-or-miss results depending on various ePub rendering engines.
Last edited by DiapDealer; 03-21-2012 at 01:01 PM.
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