@Chapter
  @Title { Pie Graphs }
  @Tag { pie }
@Begin
@LP
This chapter describes how to draw pie graphs, using the @Code "@Pie"
piegraphs. @Index { pie graphs }
pie. @Index { @Code "@Pie" symbol }
symbol.  For example,
@ID @OneRow -1px @Break @Code @Verbatim {
@Pie
{
    @Slice
        weight { 20 }
        label { Admin (20%) }
    @Slice
        weight { 40 }
        paint { green }
        label { Research (40%) }
    @Slice
        weight { 40 }
        paint { lightred }
        label { Teaching (40%) }
}
}
produces the pie graph
@CD @Pie
{
    @Slice
        weight { 20 }
        label { Admin (20%) }
    @Slice
        weight { 40 }
        paint { green }
        label { Research (40%) }
    @Slice
        weight { 40 }
        paint { lightred }
        label { Teaching (40%) }
}
This example shows off most of what @Code "@Pie" can do.
# there are many options, but for the most part they offer
# detailed adjustments, not additional features.
@BeginSections
@Include { pie_intr }
@Include { pie_slic }
@Include { pie_over }
@Include { pie_capt }
@Include { pie_labe }
@Include { pie_erro }
@Include { pie_summ }
@EndSections
@End @Chapter
