Re[2]: transparent layer?

[Alan G Isaac <aisaac american edu>]

On Wed, 16 Oct 2002 17:26:54 -0500 Luis A Escobar <luis lsu edu> wrote:
>   I meant pictures to teach the concepts of union, intercepts, etc to
>   illustrate those operations. I saw the case you document and that
>   is exactly what i was looking for.

Fwiw, these are simple to produce in PostScript.
If you find a way to do it in Dia, please post
a brief description.

Thanks,
Alan Isaac