In Pie Chart, system will display the statistical data in circular shape with slices indicating different proportions related to the subject of the report.
You can click on any of the slice and system will display more details associated with the type of the report. In example below, the total price of the order is being displayed.
If you wish to remove any of the slices from the chart, tap on any item from the right side and it will be removed. To put it back in the pie chart, tap again to bring it back.