Lately I've been converting some fanfics into .epub format using the Sigil program .

I've been separating the longer fanfics into chapters by using the "Insert Chapter Break" menu option.

I am able to "create TOC" (there's a menu option for that) but then the TOC never shows up pm my e-reader (a Nook) when I download the fanfic into the Nook.

Do you know why, and can you tell me how to make the TOC show up in my e-reader?

I looked at the Sigil help page on creating a TOC but it was not helpful for this.

Would appreciate any advice. Thanks in advance.