To add a legend:
1.If the diagram is in a document or a worksheet, double-click on the diagram to open it.
2.Open the list box under Diagram Design[Diagram Layout] > Add Diagram Element and select Legend.
To remove the legend:
1.If the diagram is in a document or a worksheet, double-click on the diagram to open it.
2.Double-click on the diagram plane to open the Properties dialog box.
3.Uncheck the option Use legend.