1.If the diagram is in a document or a worksheet, double-click on the diagram to open it.
2.Double-click in the legend on the curve text that you want to change.
3.In the Text field, place the cursor at the position where you would like to insert a field.
4.Select the desired item from the Fields list box. A field is then inserted into the text. This field is later replaced by the updated data set information.
Note: If you leave the text input field empty, the selected diagram style will determine the text.