Field help (ADEFGRA) 

Defines the graphical representation used for the data to be presented (from the choices Bars, Lines, Area, Sectors). An image is displayed as a function of the choice made illustrating the type of presentation obtained.

If only one series of values is available, the graphical representation is by default fixed by this parameter.

If several series of values are presented, it is possible to mix the presentation modes (one series in the form of bars, another in the form of lines for example). In this case, each series of values is represented as a function of the field Representation located in the grid of fields :

When used, if the representation of the series is homogenous (that is there is only one series in the graph), there is a graph type selector for the user to select a different mode of presentation.