Image styling css... what do all these properties do?

[ElMiko]

Originally Posted by RbnJrg

In Calibre Viewer, within the Preferences, under page structure, you may have the option to maintain cover aspect ratio enabled. And under Miscellaneous, you may have enabled the option to remember the window position and size (while I don't).

THAT was it. Calibre was interpreting your Scaramouche image as the cover, and then preserving the aspect ratio. Whereas my Bosch image was not considered the cover image and therefore not having its aspect ratio perserved.

If I duplicate the page with your Scaramouche image (making it a two-file epub instead of a one-file epub), the second image gets squished when the viewing window is narrowed.

What a relief... I was starting to feel like a crazy person.

[PeterT]

Originally Posted by RbnJrg

Really? Please, open the sample I attach (an epub3) in Kobo for Android and see what it looks like; then open the same file on one of your Kobo devices and tell me if you find any differences in what you see. It would be a really nice surprise if your Kobo device didn't add any extra blank space because of the pictures, and also avoided page breaks where they weren't needed.

I've got this epub now on my Libra Colour as both an ePub 2 and ePub 3. What screen shots would you like to see? (The ePub 3 was NOT converted by Sigil or calibre; just renamed to a .kepub.epub file). (The .epub opens in the RMSDK based engine; the .kepub.epub in the other engine).

[RbnJrg]

Originally Posted by PeterT

I've got this epub now on my Libra Colour as both an ePub 2 and ePub 3. What screen shots would you like to see? (The ePub 3 was NOT converted by Sigil or calibre; just renamed to a .kepub.epub file). (The .epub opens in the RMSDK based engine; the .kepub.epub in the other engine).

In principle, you should not see any white space generated by the images but open the sample in Calibre Viewer or in any of the Sigil's plugin (Readium, Bibi Reader, JSReader) or in Thorium and you'll see how the epub must display images and text. The sample is an epub3 (it has everything from animations to jagged outline images) with no fallback code to epub2, so epub2 ereaders can't show properly the sample contain. The sample is intended to test the epub3 capabilities of Kobo devices (as I said in my previous post, in Kobo for Android the sample looks great).

PS: Please, tell me if there are differences between what Kobo device shows and what you see in Calibre, Sigil's plugins or Thorium (or Kobo for Android if you want to install the app in your smartphone). No matter the font size you set, the layout mustn't break.