-B<RRDtool> has now support for B<pie charts>. If you include the
-B<PART> command, the canvas is extended to make room for a chart
-The size of the canvas is determined by the lesser of
-L<width and height|rrdgraph/item_Size>.
+#=item B<PART> : I<vname> B<#> I<rrggbbaa> [ B<:> I<legend> ]
+#
+#B<RRDtool> has now support for B<pie charts>. If you include the
+#B<PART> command, the canvas is extended to make room for a chart
+#The size of the canvas is determined by the lesser of
+#L<width and height|rrdgraph/item_Size>.
+#
+#Pie parts will be concatenated, the first one will start at the
+#top and parts will be created clockwise. The size of the part
+#is defined by the value part of the L<VDEF|rrdgraph_data/VDEF>
+#function. It should return a number between 0 and 100, being a
+#percentage. Providing wrong input will produce undefined results.