ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMMap Class / DefaultScale Property
Version

DefaultScale Property
Gets or sets the scale used when you open new views of the map. When set, the application automatically applies this property after DefaultExtent to ensure the view is at the correct scale.
Syntax
public double DefaultScale {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also