There is no "pop up style/model" to be applied to epubs. Popup (foot|end)notes are a function of readers, not epubs. Are you talking about using html5/epub3 "aside" elements and epub:type="noteref|footnote" that iBooks has incorporated as popups into its reading system?
Last edited by DiapDealer; 03-07-2016 at 09:35 PM.
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