@lumpynose if you're interested in creating Apple Books (iBooks) compatible popup footnotes, you might want to read the footnote section of the
Apple Books Asset Guide, because Apple is really picky when it comes to footnote id attributes. It expects:
Code:
<aside id="myNote" epub:type="footnote">
<p style="direction:rtl">Text in popup</p>
</aside>
or
Code:
<div id="myNote" epub:type="footnote">
<p style="direction:rtl">Text in popup</p>
</div>
If you add the id attribute to other tags inside of
<div> or
<aside> tags, popup footnotes won't work.