Quote:
Originally Posted by mlewis78
This is only with the two library EPub books I've borrowed.
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I have seen this with a few commercial ePubs, and the problem, as Jellby suggests, was large margins specified in the ebook's CSS. It one case I looked at it appeared that the problem might be a mobile Adobe Digital Editions bug (0.5em treated as 5em), but commercial ebooks tend to have horrendously complicated CSS logic so I was never certain of that. If the margins are specified in "em" (letter widths) then they get larger as the font is made larger.
The easiest way to check that this isn't Opus specific is to try displaying the same ebook with
Sony eBook Library, because eBL also uses mobile ADE to display ePubs.
The extra space at the bottom of the screen is due to "widows and orphans", specifying the number of lines in a paragraph that should be left at the top (widows) or bottom (orphans) of a page. By default mobile ADE sets these to 2, which is a terrible choice for a large font on a small screen. This can be over-ridden by extra-css in Calibre (for DRM-free ePubs), but it is in my opinion a bug for Bookeen to let you use this large a font without changing widows and orphans to zero.