ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping.Controls Namespace / MapControl Class / UpdateOverlay Method / UpdateOverlay(IDisposable,CIMGraphic,Double,Double) Method
The IDisposable instance returned from an AddOverlay method call.
The graphic to be used for the update
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

UpdateOverlay(IDisposable,CIMGraphic,Double,Double) Method
Updates the graphic for an overlay graphic on the map control.
Syntax

Parameters

disposable
The IDisposable instance returned from an AddOverlay method call.
graphic
The graphic to be used for the update
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

True if the overlay was updated. False otherwise.
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