ArcGIS Pro 2.7 API Reference Guide
CIMLayoutDocument Class
Members 

ArcGIS.Core.CIM Namespace : CIMLayoutDocument Class
Represents a layout document which is the document type used for saving .pagx files.
Object Model
CIMLayoutDocument ClassCIMBinaryReference ClassCIMLayoutDocument ClassCIMLayoutDocument ClassCIMDefinition ClassCIMLayout ClassCIMDefinition ClassCIMDefinition ClassCIMDefinition ClassCIMDefinition ClassCIMDefinition Class
Syntax
Inheritance Hierarchy

System.Object
   ArcGIS.Core.CIM.CIMObject
      ArcGIS.Core.CIM.CIMVersion
         ArcGIS.Core.CIM.CIMLayoutDocument

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

CIMLayoutDocument Members
ArcGIS.Core.CIM Namespace