How can I keep the pevious cover as an image?
I change the book cover with the Calibre program in epub format. When I select and insert a new cover, it just replaces the previous one. However I would like to keep the original cover as a fly page, i.e. as the first image immediately following the new cover when I open the book.
Is it possible to do it in Calibre? If so, what are the procedures?
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