How to: Position Labels in a Pie Chart (Visual Studio Report Designer)
You can place point labels on the inside or outside of a pie chart. By default, point labels appear on the inside. To place point labels on the outside, you must select a position.
To change the position of point labels in a pie chart
In graphical design mode, open the report definition (.rdlc) file that contains the chart.
Right-click the chart, and then click Properties.
On the Data tab, in Values, select the [Value] value series.
On the Appearance tab, click Point Labels.
In Position, clear Auto, and then select a button other than the center button.
Selecting the top, top right, right, bottom right, bottom, bottom left, left, and top left buttons indicate that the point labels are displayed around the outside of the chart. Selecting Auto or the center button places the point labels inside the chart.