In the ebook conversion/page setup dialog you can define margins in "points".
Kovid, would it be possible to add the possibility to define these margins in "em"s?
Why am I asking this? The Adobe Reader used in the new big Pocketbooks (902, 903) desperately needs margins. It is possible to set them in Calibre to something like 36 points, but than these files can't be read on 6"-devices. By setting the margins to 2em or 3em the books might be readable in both devices. Thank you in advance.