Quote:
Originally Posted by KevinH
Sigil has a plugin called ePub3-itizer that can convert epub2 epubs to epub3. I am positive Calibre can do exactly the same thing using an internal menu or command but they named it funny, something along the lines of "updating" or "upgrading" your epub. Best ask in the calibre forum and I am sure someone can point you to it.
As the author of Sigil's ePub3-itizer, I would be happy to summarize the conversion process steps if you have questions. Just ask.
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Thank you. I appreciate the help.
I have found the epub3 setting in
Preferences>Output Options>EPUB output>EPUB version and changed it to v3 as default
The convert setting is in the Editor: Tools>Upgrade Book Internals.
Just about finished reading my current book, so I'll use v3 for the next book I fix.