ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping.Controls Namespace / MapControl Class / AddOverlay Method / AddOverlay(Geometry,CIMSymbolReference,Double,Double) Method
The geometry of the overlay.
The symbol to use for the overlay.
Map reference scale or -1
Visibility factor for showing the overlay through other objects when obscured in 3D.
Valid range is [0..1], any other value will be treated as 0 (not visible).
Version

AddOverlay(Geometry,CIMSymbolReference,Double,Double) Method
Add an overlay graphic to the map control.
Syntax

Parameters

geom
The geometry of the overlay.
symbol
The symbol to use for the overlay.
referenceScale
Map reference scale or -1
showThrough
Visibility factor for showing the overlay through other objects when obscured in 3D.
Valid range is [0..1], any other value will be treated as 0 (not visible).

Return Value

An object that when disposed will remove the overlay.
Remarks
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 11, Windows 10

ArcGIS Pro version: 3.2 or higher.
See Also