Quote:
Originally Posted by jhowell
Amazon supports multiple different Kindle book formats and associated rendering software depending on the device/app used for reading. Devices and apps released in the last five years support KFX format, providing "Enhanced Typesetting".
Previewer 2 predates KFX and shows how a book will render from the older MOBI7 or KF8 formats. That is how the book will look on older devices and also on newer ones if sideloaded instead of being delivered over-the-air by Amazon.
Previewer 3 shows how the book will render from KFX format, which can be quite different. One of the features of Enhanced Typesetting is intentionally not obeying all of the formatting specified in the book in order to produce a more readable result on smaller screens, like phones.
When your book is actually published Amazon will make some adjustments during the publishing process, but what Previewer 3 shows is very close to the end result in most cases.
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FWIW, we still use KP2 to assess (easily) how something will look on DX, etc. (the KF7 devices).
I find that KP3 is roughly approximate, but it has
several glitches, particularly around images, that make it important to be able to live test on real devices.
Hitch