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720 bytes added ,  10:21, 28 July 2018
NEW
< [[Layers]] | [[Visuals]] | [[Presentations]] >

PDF has a concept of layers that you can enable and disable (at least in a few viewers). This has nothing to do with ConTeXt’s [[Layers]].

There’s no other documentation yet, maybe have a look into the source {{src|attr-lay.mkiv}}.

<texcode>
\defineviewerlayer[Plane]
\setupviewerlayer[Plane][
state=start,
visible=no, % initially
title=Test,
%tag=, % don’t know?
editable=yes, % in Acrobat Pro?
printable=yes,
export=yes, % exportable in xml?
scope=global, % or local
]

\starttext
\input tufte

\startviewerlayer[Plane]
{\bfa TOP SECRET}
This information is on a different plane of existence.
\stopviewerlayer

\input knuth
\stoptext
</texcode>

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