ArcGIS Pro 2.2 API Reference Guide
LeaderTolerance Property

ArcGIS.Core.CIM Namespace > CIMCallout Class : LeaderTolerance Property
Gets and sets the leader tolerance which is the closest distance (in points) to the text the anchor point can be for the callout to draw.
Syntax
Public Property LeaderTolerance As Double
public double LeaderTolerance {get; set;}
Requirements

Target Platforms:Windows 10, Windows 8.1, Windows 7

See Also

Reference

CIMCallout Class
CIMCallout Members