Quote:
Originally Posted by Strether
The boldness slider only works if the book is in AZW3 format, and only, apparently, if the book arrives from Amazon already in that format. If you get a book in Mobi format from whatever source and convert it to AZW3 in Calibre, it does not produce the boldness option.
Jim
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The bold slider works with the included fonts with KFX. Mobi is now even more obsolete then before. So stay away from Mobi.