Hey folks,

I am using the following to insert a full page landscape figure:

\FullPageLandscapeDiagram
    {SomeDiagram}
    {Some diagram's caption.}
    {Some_Diagram.svg}

Which is defined as follows:

\def\FullPageLandscapeDiagram#1#2#3%
{
    \page 
    \setuppapersize[diagram]
    \setuplayout[fullpage]
    \startframedtext[width=.95\textwidth,bottom=\vss,top=
\vss,align=right,corner=rectangular]
    \placefigure
        [force][figure:#1]
        {#2}
        {\externalfigure[#3][width=.95\textwidth]}
    \stopframedtext
    \page
    \setuppapersize[main]
    \setuplayout[reset]
}

It works great, except that most of my figures have transparent
backgrounds and since the page colour is already black, I can't make out
some of the images properly.

How can I set the figure background colour for transparent images?

-- 
Kip Warner -- Software Engineer
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http://www.thevertigo.com