ArcGIS Pro 2.7 API Reference Guide
AddOverlayAsync(CIMGraphic,Double) Method

ArcGIS.Desktop.Mapping Namespace > MapTool Class > AddOverlayAsync Method : AddOverlayAsync(CIMGraphic,Double) Method
The graphic to be added to the overlay.
Map reference scale or -1
Add an overlay graphic to the map view.
Syntax
protected Task<IDisposable> AddOverlayAsync( 
   CIMGraphic graphic,
   double referenceScale
)
Protected Overloads Function AddOverlayAsync( _
   ByVal graphic As CIMGraphic, _
   ByVal referenceScale As Double _
) As Task(Of IDisposable)

Parameters

graphic
The graphic to be added to the overlay.
referenceScale
Map reference scale or -1

Return Value

An object that when disposed will remove the overlay.
Remarks
When the tool is deactivated all overlay graphics will be removed.When the referenceScale is not equal to -1, the overlay will be created in real world units relative to the provided map reference scale (referenceScale). Otherwise, the overlay will be created in units of points. This is only supported in 2D.
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

MapTool Class
MapTool Members
Overload List