Checking viewer layers:
* \setupviewerlayer doesn’t work; e.g. "state=stop" only works if I put
it in \defineviewerlayer
* visible=no has no effect
* what are the options tag/name supposed to do?
(https://wiki.contextgarden.net/Viewer_Layers)
* known problem: only Acrobat supports JS to control OCGs
(\overlayrollbutton in the MWE)
Hraban
\setupinteraction[state=start]% needed for JS
\defineviewerlayer[Gebuesch][
state=stop,
]
\defineviewerlayer[Versteck]
\setupviewerlayer[Versteck][ % doesn’t work
state=stop,
]
\starttext
Hier fängt der Wald an.
\startviewerlayer[Gebuesch]
Hier versteckt sich ein Wolf...
\stopviewerlayer
Bäume, Bäume, Bäume...
\viewerlayer[Gebuesch]{... und ein Rotkehlchen}
\startviewerlayer[Versteck]Rumpelwicht\stopviewerlayer
\defineoverlay[MitVersteck]
[{\overlayrollbutton[VideLayer{Versteck}][HideLayer{Versteck}]}]
\framed[background=MitVersteck]{Kummst du mul kuckn?}
\stoptext
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