[Jellby]

Originally Posted by Togijak

I think your argument why you delinted the page size can't be accepted. No normal user will read a eBook in PDF format on a eBook reader if he has the epub. Normal use of a PDF is on a tablet, handheld or computer and in my opinion the eBook should look more like a normal book. That was the reason to not only change the page size to A5 (14,8 / 21 cm). I also changed the margin to 15mm.

Different usages for different people. I created the plugin for myself first, and for anyone else who might find it useful. I don't typically create a PDF, but if I do, it would be for reading on screen, computer or ebook reader. Even in a computer, I'd prefer the font/page size ratio of an ebook reader rather than A4. A5 would probably be fine too. Note that what you find when you first install the plugin is just some default I thought could be sensible or useful as a starting point, feel free to modify it to your liking.

There could be several reasons for reading a PDF instead of an ePub in an ebook reader:

1. Maybe the reader does not support ePub at all (like some older ones).
2. Maybe the reader does not support some features the ePub uses or the user would like to have (like some specific font, some CSS properties...)
3. The typesetting quality (linebreaks, ligatures, kerning, etc.) is probably better in the PDF than in the direct ePub rendering, i.e., Prince cares about typesetting more than Adobe.
4. Page breaks are fixed in the PDF, and page numbers match the actual pages. This can be desired for annotations and sharing between different readers (people or devices).

For the moment there is for me only two question left

1. Can I and if yes how define some different output size / style definitions like A4, A5 (German norm size for paper) for example that could be loaded?

Yes, there is. Click Configure, then in Custom Styles you can create, rename, add, delete styles, which you can then select in the "Benutzerdefinierter Stil" drop down list.

2. Is there a known tool that can fix errors without handwork in a epub?

I don't think so. There's not even an agreement on what's an "error".