It is possible to stack several charts of the same f(x) chart. Each of these diagrams corresponds to a segment. For each segment you can define a title. The title of segments serves exclusively as differentiators for the assignment of y-axes and appears nowhere in the graphic. For parameterizing groups, you have to open the configuration table or the Properties dialog, work on the Y-Axes tab and make sure that the Axis Layout is set to Grouped.

Figure 16. Grouped Axes