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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. Duplex printing can be specified using the key <code>option=</code> from the <code>\setupinteractionscreen</code> command.(This option from the mentioned command allows multiple values. Except the number of copies, all other three print features are values for the <code>option</code> key.)
For nowAlthough the specification limits the number of copies to the maximum offered by the print dialog, any form of duplex printing (included single--sided printing) disables Adobe limited the zoomed printing fit number to pagea maximum of five for security reasons.
explain all options
= PDF Print Options =
The PDF specification describes some options that may be included in documents to make printing easier when related to number of copies, paper size, scaling and duplex printing.
At least for me, this was useful in two scenarios:
* At work, where we have a automated system for document generation. Users only have to press <code>Ctrl+P</code> and forget about which options are required for which documents.
* In copyshops, where duplex printing and no scaling were features that not everybody seemed to understand (or to handle) properly.
This feature requires a fairly recent beta version. As the time of this writing, 2016.06.20 22:14 was the lastest released version, although it has been implemented for some time.
== Duplex Printing ==
Possible values are:
* <code>page</code>: enables single--sided single–sided printing (mandatory to disable duplex printing in a printer in which is set by default).
* <code>portrait</code> enables portrait duplex printing (the paper long side is flipped).
* <code>landscape</code> enables landscape duplex printing (the paper short side is flipped).
==Print Scaling= Important Warning = It is possible to disable print scaling in the document with the <code>fixed</code> value in the key <code>option=</code> from the <code>\setupinteractionscreen</code> command. This may be a useful setting for printing documents where no content is placed on the margin area. Adobe products may shrink the content to printing area, ''whether this is required or not''. When the document has no content on the printer margins, resulting output will be smaller than it should. ==Paper Size From PDF Document== Unless paper size is read from the PDF document, Adobe will use the default paper size (A4 in Europe and letter in America). <code>paper</code> is the value for the <code>option</code> key that specifies the selection of paper size from the document. As explained before <code>\setupinteractionscreen[portrait, fixed, paper]</code> would print duplex flipping the long side, no scaling and taking paper size from the PDF document. ==Number of Copies== The number of copies is set with the <code>copies</code> key from <code>\setupinteractionscreen</code>.
== Conformant PDF Readers ==
