ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMMap Class / DefaultViewingMode Property

DefaultViewingMode Property (CIMMap)
Gets or sets the viewing mode that new views of this map are opened with.
Syntax
public MapViewingMode DefaultViewingMode {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also