ArcGIS Pro 2.6 API Reference Guide
Caption Property (ILayoutPane)

ArcGIS.Desktop.Layouts Namespace > ILayoutPane Interface : Caption Property
Gets or sets the caption for the pane the way it appears on the tab.
Syntax
string Caption {get; set;}
Property Caption As String
Remarks
By default the caption is equal to the name of the layout.
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

ILayoutPane Interface
ILayoutPane Members