ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMTextSymbol Class / LineGap Property

LineGap Property
Gets or sets the spacing between lines of text. This is also known as leading or line spacing.
Syntax
public double LineGap {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also