To add or delete an axis label to a curve, do the following:
1.Click on the curve to select it.
2.Select or deselect the option Diagram Design[Curves] > Axis Label.
To write an axis label directly on an axis, do the following:
1.Double-click on the line or division of the axis to open its properties dialog box.
2.Switch to the Axis Label tab.
3.If applicable, check the option Axis labeling on.
4.Uncheck the option Use axis labels of curves.
5.Now enter the desired label in the Text field.