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

Kerning Property
Gets or sets a value indicating whether the text is drawn with metric kerning, which adjusts the spacing between individual letter forms.
Syntax
public bool Kerning {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also