ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / IMapViewOverlayControl Interface / RelativePosition Property

RelativePosition Property (IMapViewOverlayControl)
When the window is resized the distance from the edge is maintained relative to a corner of the map.
Syntax
OverlayControlRelativePosition RelativePosition {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.1 or higher.
See Also