When several series are presented in the graph (provided that the presentation of all the series is identical and is not by sector type), it is possible to specify how the series values are combined in the display, by entering the following value :
Multiis used to present the values of each series side by side (one color by series)
Cumulative is used to present the values in a vertical total.
Comparative is used to present them in a relative comparison (the height of the graph is constant).