ArcGIS Pro 2.7 API Reference Guide
AddOverlay(Layer,Int64,CIMSymbolReference,Double) Method

ArcGIS.Desktop.Mapping Namespace > MapTool Class > AddOverlay Method : AddOverlay(Layer,Int64,CIMSymbolReference,Double) Method
The layer containing the feature.
The ObjectID for the feature.
The symbol to use for the overlay.
Map reference scale or -1
Add an overlay graphic for a feature on the map view.
Syntax
Protected Overloads Function AddOverlay( _
   ByVal layer As Layer, _
   ByVal oid As Long, _
   ByVal symbol As CIMSymbolReference, _
   ByVal referenceScale As Double _
) As IDisposable

Parameters

layer
The layer containing the feature.
oid
The ObjectID for the feature.
symbol
The symbol to use for 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.
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

MapTool Class
MapTool Members
Overload List