Overlays represent various types of charts such as bar and line. Multiple overlays can appear on the same chart and are displayed in the order that they are added to the chart. Transparancy can be used to see underlying overlays.

Classes

	Class	Description
	AnalogGauge	The AnalogGauge object draws a graphical representation of a instrument gauge and offers drill-down capability that can be used to update the value of the gauge. Many aspects of the gauge such as color, dial diameter and label font and color can be adjusted.
	AreaOverlay	The AreaOverlay object is used to chart non-stacked area series. Series must be of type jChart.Overlay.Series.AreaSeries
	BarOverlay	The BarOverlay object is used to chart non-stacked bar series. Series must be of type jChart.Overlay.Series.BarSeries
	LineOverlay	The LineOverlay object is used to chart line series. Series must be of type jChart.Overlay.Series.LineSeries
	OverLayBase
	PieOverlay	The jChart.Overlay.PieOverlay object is used to create pie charts. The series should be jChart.PieSeries objects and each series will represent a single slice of the pie chart. No Y Axis or X Axis values are used for this type of overlay.
	ScatterOverlay	The jChart.Overlay.ScatterOverlay object is used to chart scatter series. Series must be of type jChart.Overlay.Series.ScatterSeries
	StackedAreaOverlay	The jChart.Overlay.StackedAreaOverlay object is used to chart stacked area charts.
	StackedBarOverlay	The jChart.Overlay.StackedBarOverlay object is used to chart stacked area charts.

Enumerations

	Enumeration	Description
	PieOverlay..::.Mode	Indicates the value that will be displayed on a pie slice.
	PieOverlay..::.Placement	Indicates the positioning of displayed values within each pie slice.