Thread: Kindle firmware update 5.13.5
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Old 03-18-2021, 10:26 AM   #49
jhowell
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Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by raghiid View Post
Are these books converted through calibre? Because mine are solely epubs converted (and embedded with custom fonts) through calibre.
No, the book that exhibits the problem is an unmodified Amazon purchase.

Quote:
Originally Posted by raghiid View Post
...at the moment this option is not available with the new update.
I suspect a misunderstanding/mistake by customer service. That option is definitely still available for many books.

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After further testing I have determined that the Publisher Font option is controlled by metadata within the KF8 file. If EXTH field 528 (OverrideKindleFonts) is set to "true" then the Publisher Font option is made available for that book. If it is missing or set "false" the Publisher Font option will not be shown.

I believe that this is a change in the new firmware (5.13.5), but I don't have a Kindle running the previous firmware to verify that.
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