Pies display data labels that contain descriptions for pie segments, and provide tooltips with additional information.
You can specify which information should be displayed within data labels (the labels displayed beside each pie) and tooltips (display that is shown when you hover over the pie). To do this, use the Data Labels and Tooltips buttons in the Design tab.
These buttons invoke the drop-down menu, which is similar for both buttons. This menu allows you to specify which values are displayed within data labels or tooltips.
1.Click the Design tab
2.Click the drop down on Data Labels and select how to present the data e.g. Argument And Value
3.Repeat for Tooltips