[NTG-context] showing and hiding layers

Wolfgang Schuster schuster.wolfgang at googlemail.com
Tue Feb 1 09:58:39 CET 2011

Am 31.01.2011 um 16:37 schrieb Skip Collins:

> I am trying to create a layer to contain letterhead graphics. I would
> like the letterhead to appear by default when a pdf is opened and
> printed. But I would also like to be able to hide the letterhead layer
> in Acrobat when printing on pre-printed paper.
> My simplistic, always-displayed letterhead looks like:
> %%% start code %%%
> \definelayer[letterhead]
>            [x=0in,y=0in,width=\paperwidth,height=\paperheight,state=start]
> \setlayer[letterhead]
>         [hoffset=1in,voffset=0.5in]
>         {LetterHeadMark}
> \setupbackgrounds[page][background={letterhead}]
> \starttext
> Hello, World!
> \stoptext
> %%% stop code %%%
> But there is no obvious way to turn this off when printing.
> Contextgarden suggests using \defineproperty to create a pdf layer. I
> can show and hide this layer in acrobat, but it always opens up
> hidden. I am also not sure how to place the letterhead exactly on the
> page using this method.
> Any suggestions?

In MkIV \startproperty is obsolete and you should use \startviewerlayer:





Hello, World!


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