ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / Pane Class / GroupID Property
Version

GroupID Property (Pane)
Setting the GroupID property enables Pane numbering.
Syntax
protected internal string GroupID {get; set;}
Remarks
The application keeps track of the number of Panes opened with the same GroupID and this count is presented in the Pane captions; for example, 'MyMap (1/2)' and 'MyMap (2/2)'.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.
See Also