[Groff] Getting a background color

[Clarke Echols]

Thanks to all who responded to my question about building a
presentation using groff instead of PowerPoint.  The ideas were
very good, and I may still pursue them.  As for now, I was looking
for a way to do what I needed to do using groff, going to PS or
PDF.

I discovered a way to create a background color, over which I
can create colored patterns and text.  The result is a solid,
constant color over the entire page.

1.  Draw a box that borders the entire page by using the polygon
    solid draw escape sequence (\M[color]\D'E...'\M[]).

2.  Draw any other figures and fill with desired colors.

3.  Draw the text for the page.

Begin next page.

Whether this gets me what I want for a presentation remains
to be seen, but at least I can create a page with colored background
and put things exactly where I want them, without using PowerPoint.

If I want them as paper slides, I can send the pages to a color
printer.

Now, if I could find a way to transition colors from one to another
across the space, either top-to-bottom, side-to-side, or
corner-to-corner like one package does (I didn't download and try
it, but the demo pages look fascinating)...

FWIW,

Clarke