document, all of the bits within the bitmap's bounding box will be
set, overwriting whatever color or graphics where already on the page.
If this effect is not desired, and you only want to set bits explicitly
- assigned in drawing the graph, set <B>background</B>="transparent".
+ assigned in drawing the graph, set <B>bgcolor</B>="transparent".
<DT><A NAME=d:center HREF=#a:center><STRONG>center</STRONG></A>
<DD> If true, the drawing is centered in the output canvas.