Am 17.12.2009 um 14:05 schrieb Erik Margraf:
> Hi all,
> i have two questions regarding the use of layers.
>
> -- Is there an easy way to position a layer in the middle of the page.
> My intent is to position some kind of graphic/picture there.
> I usually try to wrap the picture in a "hbox to \paperwidth {\hfil
> \externalfigure{} \hfil} and then
> wrapping the hbox in a vbox
> -- Is there a better way to achieve this?
> -- How to do that with layers?
>
> -- Is it possible to define and position layers in one Macro. I have
> something like the following
> in mind (untested):
>
> \define[1]\MLayer{
> \definelayer[#1]
> \setlayer[#1][state=start]{\externalfigure[#1]}
> }
> My experience so far is, that it's necessary for a layer to appear that
> it is listed in "pagebackgrounds"
> ist this true? With this it seems, that a macro like that above is
> impossible, true?
\define[1]\MLayer
{\definelayer[#1]%
\expandparameters\setupbackgrounds[page][background={\currentvalue,#1}]%
\setlayerframed[#1][width=\paperwidth,height=\paperheight,frame=off,align={middle,middle}]{\externalfigure[#1]}}
Wolfgang
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