Speaking of which....Now that Sigil is getting better support for ePub 3, wouldn't it be better to incorporate/support the "pop-out note"? Pop-outs would be way-mo-betta than either footnotes or endnotes in an ebook format.
I have to admit I haven't researched that capability much, but IIRC that is an ePub3 capability generally, rather than a specific device, isn't it??
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