Symbol used to draw a leader.
[Visual Basic .NET] Public Property LeaderSymbol As ICallout
[C#] public ICallout LeaderSymbol {get; set;}
Product Availability
Available with ArcGIS Desktop.
Remarks
The LeaderSymbol property accepts objects that support ICallout. MarkerTextBackground objects cannot be used for the LeaderSymbol property. This property is an application-level setting and is used in ArcMap to add a leader to an annotation feature if the annotation feature's symbol does not have one defined.