ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMExtentIndicator Class / CollapseSize Property

CollapseSize Property
Gets or sets the minimum size of the extent indicator before symbolizing it as a point. Units in points.
Syntax
public double CollapseSize {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also