<para>Use previous parameters. By default, the PostScript
graph is automatically scaled both horizontally and
vertically so that it fills the page. However, when
preparing a series of graphs for use in a presentation, it
is often useful to draw a new graph using the same scale,
shading and ordering as a previous one. The
<para>Use previous parameters. By default, the PostScript
graph is automatically scaled both horizontally and
vertically so that it fills the page. However, when
preparing a series of graphs for use in a presentation, it
is often useful to draw a new graph using the same scale,
shading and ordering as a previous one. The