= Duplex Printing =
It is possible to specify the options for duplex printing in ConTeXt (beginning with beta from 2015.12.22 10:50) in the PDF document itself.
* <code>landscape</code> enables landscape duplex printing (the paper short side is flipped).
== Important Warning ==
By now, any form of duplex printing (included single--sided printing) disables the zoomed printing fit to page.
= Conformant PDF Readers =
To the best of my knowledge, only Adobe (Reader or not) from version 9 support this feature.
evince allows duplex options in its printing dialog, but it cannot read these from the PDF document. There is an open issue in poppler to [https://bugs.freedesktop.org/show_bug.cgi?id=92779 implement this feature].