ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMBasicFeatureLayer Class / FeatureBlendingMode Property

FeatureBlendingMode Property (CIMBasicFeatureLayer)
Gets or sets the per-feature blending mode which allows features in a layer to blend against other features in the same layer that have already drawn.
Syntax
public BlendingMode FeatureBlendingMode {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.7 or higher.
See Also