ArcGIS Pro 2.9 API Reference Guide
DefaultScale Property

ArcGIS.Core.CIM Namespace > CIMMap Class : 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;}
Public Property DefaultScale As Double
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

See Also

Reference

CIMMap Class
CIMMap Members