Quote:
Originally Posted by 42piratas
Thanks for the reply, but it seems you haven't opened many picture ebooks, otherwise you'd be aware of how they work. Cheers!
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I've been creating stuff like this since 1992 and Web eMagazines from 1994. I know exactly how ebooks work. Unless you are using Mac/PC and special viewer there is only one page ever.
The most recent picture book I opened was Beatrix Potter Ultimate collection.
https://www.amazon.co.uk/gp/product/B07LB2N4GJ
I converted it to an ePub to view on Kobo and Android Lithium app as well as viewing on Kindle PW3 and Kindle Oasis (2nd aka gen 9)
I was amazed how well they did it and it does work on a regular 6" Kindle in monochrome, but really needs the 10" colour tablet. Almost all ebooks are read on phones (via apps) or mono eink. Amazon has 92% of the world English language market, but we also publish on Apple, Kobo, Tolino, Google, Barnes & Noble etc with ePub. We also publish on Amazon and only by epub upload.
There is no sensible way to have two pages in an ebook other than sequential one-at-a-time. An image MUST fit on one page, which reflows to fit the screen size.
We use width 95% and height auto for landscape images, width auto and height 95% for portrait images and actual px for width and height if it's a small image. We test new styles on 5" to 10.3" eink, 4.3" phone to 10" tablet and Workstation Calibre Viewer (4K 24" screen).
We make sure the ebook works on old mobi Kindle, current Kindles, decent Android Apps, 5" Sony PRS-350 epub and Kobo.
Only some picture books suit real ebooks. Make sure it looks OK on a real 6" eink that is 167 dpi and 6" 300 dpi as well as a phone.
The Sigil preview is irrelevant.