Drawbacks with Pop Up Footnotes in epub 3 ?
I have started formatting footnotes in a new epub3 as pop-ups. I suddenly thought although this will work fine on iPads, what will happen with other epub readers? I am afraid that the footnotes will become invisible on some epub readers. I suppose they might work on some kobo devices. Any advice on the drawbacks and device limitations in using pop-ups for footnotes would be greatly appreciated.
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