"Hide Non-linear Fragments" not shown in menu
Hi,
I have a epub3 book with epub3 standard footnote format, also in Sigil, it's reported as Epub3. But in KO menu, "Hide Non-linear Fragments" is not shown, I couldn't hide those footnots.
I want to know what will trigger KO to show this option, so I could tweak this book a little.
Thanks.
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