ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMChartFillSymbolProperties Class / Opacity Property

Opacity Property
Gets or sets the transparency level of histogram bars.
Syntax
public int Opacity {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.3 or higher.
See Also