Quote:
Originally Posted by Indigo121
Can someone please explain to me the concept of embedded fonts? You're saying you can embed a font in an epub/mobi and the font will show on the device even thought it's not installed on it? How is that possible? Have I misunderstood?
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When you embed a font into a book and then put the book onto the reader, the font is on the reader as well; it's literally inside the book. Your reader does need to have a function to use the embedded font. Some readers just call it "Use Embedded Font" or something, the Kindle calls it "Publisher Font".
If your file is an EPUB or an AZW3/KF8 (same thing), then you need to convert in Calibre to embed the font; so, you can end up converting from EPUB to EPUB or from AZW3 to AZW3.
If your input and output format are the same, I would advise to keep the original outside of Calibre as a backup. Calibre keeps a backup called "original_epub" or "original_azw3", but it's easy to lose that.