ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / PopupDefinition Class / Dockable Property

Dockable Property
Gets or sets whether the popup content is added to the default dockable window or a new pinned window.
Syntax
public bool Dockable {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.5 or higher.
See Also