[cybmole]

could someone please explain what exacly goes into creating the optimised left & right page margins that I see on sony reade, with converted epubs please.

I ask because calibre does something to badly formatted epubs, that improves the visual appearance, yet all I can see added to epub code is the @page line in each xhtml file, but that only specifies top & bottom margin, not left & right.
( also it renames CSS entries to calibre1, calibre2 etc which obscures what other changes it may have made )

I know that if I have a poorly formatted epub where the L/R margins are either too wide or are completely missing ( i.e. where text runs right up to bevel on reader), then an epub-to-epub convert will fix it -

so I tried to fix one manually yesterday, & could not see how to do it within CSS. eventually I gave up & reconverted it & now it is fine.

so what exactly does calibre do to reset L & R margins please