I created a test EPUB with an embedded font used for h1 elements. No font was specified for the body or regular paragraphs.
Master MOBI (MOBI+KF8) and AZK were created using Kindle Previewer 2.94. KFX was created using Kindle Previewer 3.15 and the KFX Output calibre plugin.
The results were as follows:
MOBI+KF8 (Kindle Previewer 3.15 - Tablet device, Kindle for PC 1.20.1, Kindle for Android 7.18.0.1), AZK (Kindle for iOS 5.15.2), KFX (Kindle Previewer 3.15, Paperwhite II 5.8.11): Main body text shows whatever font the user selects and headings always show the embedded font.
MOBI+KF8 (Kindle Previewer 2.94 - Voyage device, Paperwhite II 5.8.11): Main body text and headings show whatever font the user selects. Headings show the embedded font only when "Publisher font" is selected.
So the e-ink Kindles rendering KF8 are the exception and do not behave as I would expect.
Last edited by jhowell; 10-18-2017 at 11:54 AM.
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