Quote:
Originally Posted by markvdvelde
I tried this too, but it failed. The original file was a vertically written azw3, but without a cover. With Calibre I added a cover, converted the file from azw3 to azw3 (and to ePub), but the text is always converted to horizontal.
Plus: mobi seems to be capable of displaying vertical text (you will see this when you open the mobi attachment on a Kindle or in the Kindle Previewer). But once I change the cover and covert it, the vertical style is gone...
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The attachment in your most recent post is a Master Mobi containing both Mobi7 and KF8 formats components in a single file. Even though it has a .mobi extension it is not pure MOBI format. It will display vertically on devices that support KF8 format.
As a test I used kindelunpack to split that file into separate .azw3 and .mobi files. As expected the split .azw3 displayed vertically and the .mobi did not.
I then added the .azw3 file to calibre, added a cover, and converted .azw3 to .azw3. The result was a .azw3 file containing vertical layout and a cover. I tested it in Kindle Previewer, Kindle for PC and a Kindle Oasis. It displayed correctly (vertically with cover) on all of these.