The Pie Chart displays a classified distribution of a the selected measurement type.  For example, the Region:Diameter measurement type could be selected. The graph will then show a distribution of the number of objects (Count) in each class.

The pie-chart can also show the Sum of the values per class. For example, the total object area per class could be displayed. Labels are displayed in the format <Class Name> <Value> where Value can be either the number of objects (Count) or the total sum of all object values (Sum).

The pie chart labels are toggled using the Labels button and the legend using the Legend button.