Image_Graph_Common | --Image_Graph_Element | --Image_Graph_Plotarea_Element | --Image_Graph_Marker | --Image_Graph_Marker_Circle | --Image_Graph_Marker_Bubble
This will display a circle centered on the datapoint with a radius calculated as a percentage of the maximum value. I.e. the radius depends on the y-value of the datapoint
void setMaxRadius( int $radius)