# [NTG-context] Fielstack and Layers for Presentation

Hans Hagen pragma at wxs.nl
Sat Oct 14 19:40:05 CEST 2006

```Renaud AUBIN wrote:
> Hi all,
>
> After several trial-error experiments, I obtained what I want with the
> attached code. I use only one background for the frames within
> definesymbol because the use of several background "failed" (only the
> last one is eventually displayed). Now, I would like to know if it is
> possible to obtain a deterministic random-like shapes, i.e. to get
> always the same shape for Overlay1...
>
> Renaud
>
> PS: Thanks to Peter, Andrea and Hans for the thread absolute positioning
> of figures ;)
>
.... nice example ....

if you're in exploration mode :

take a look at s-pre-61/62

you can do similar tricks with pdf-layers (layout components in context)

(try \showlayoutcomponents in a document and open the acrobat layer tab)

i first used such layers in the dante2005 aniv presentation (times stepping, stacking page building)

the advantage is that one is not using annotations, which have some limitations (like no embedded hyperlinks)

Hans

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