Ah, I see what you're getting at now, and no, I don't see any way to adjust the font attributes for the header/footer in BD.
It sounds like it might be something that has to be addressed by the BD creator, vvv, who has been known to grace us with his presence periodically.
You might be able to do some sort of hybrid conversion process (I'm out in the tall grass here, as I'm guessin' and supposin' about things I haven't even looked at, let alone tried). What I mean is you might be able to do some of the layout in BD, then save it as a HTML0 file and do the actual conversion via libprs500 -- but someone who knows more about the matter (and there are a number of them around here) would have to advise you on that, I've never gotten beyond the basics for my own conversions, as I don't really need or want the extra bells and whistles on my own books.
