[NTG-context] Fwd: issue: "printable" viewer layers lack compatibility

User 19087 se.user19087 at gmail.com
Mon Jan 7 15:36:44 CET 2019

In 2017 ghostscript added support for the /Print and /View keys of the
Optional Content /Usage dictionary[1]. The use of '-dPrinted' should
display the print-only layer, per the documentation[2]:

gs -o output.pdf -sDEVICE=pdfwrite -dPrinted input.pdf

>From their repository you can see that poppler (i.e. evince) also checks
the /Print and /View keys[3].

I'm reporting this here since neither render ConTeXt's "printable" viewer
layers - not while viewing, and not after printing.

[2] https://ghostscript.com/doc/current/Use.htm#PDF_switches
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