The appearance of each data series is determined by three groups of properties in the DataSeries class: Symbol, Connection, and ConnectionArea. These properties affect different parts of the chart depending on the chart type.

The Symbol properties determine the shape, size, outline, and fill properties of the symbols drawn at each data point. They apply to chart types that display symbols, including Line, Area, and XYPlot charts. The Symbol properties also control the appearance of bars in Bar and Column charts.

The Connection properties determine the outline and fill properties of the lines drawn between pairs of data points. They apply to all collection of points for data series. For line charts the connection is the line which connects points, for area charts the connection is the area including the outline below the data points.