Thanks Booxtor for the update.
I like the option : odd/even page
I like the M92 and I am happy to see the continus work of the developers which give this good result !
Somes wishes : replace FBReader withe the PDFRead, for this the margins must be configurable and the font could be changed.
For the fonts, if the PDFRead could use the default font (defined in the M92's setup), it's a good solution, simplest than make a specific menu in the PDFReader, I think.