Thread: Make an EPUB2 into an EPUB3
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Old 11-12-2020, 10:45 AM   #6
mikapanja
Perfectionist
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Quote:
Originally Posted by thiago.eec View Post
Calibre editor has a built-in tool for that:

Tools > Upgrade book internals

It... creates an xhtml navigation file... It also removes the NCX toc, but you get it back (Tools > Table of Contents > Edit Table of Contents; then press OK without changing anything).
@ Kovid
Could the NCX removal be made optional, for backward compatibility?
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