ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMCompositeCallout Class / LeaderLineSymbol Property

LeaderLineSymbol Property (CIMCompositeCallout)
Gets or sets the leader line symbol. This is only used if LeaderLinePercentage is greater than 0%.
Syntax
public CIMLineSymbol LeaderLineSymbol {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.6 or higher.
See Also