Polygon to Polyline

The Boundary | Edit Boundaries | Change Boundary Type | Polygon to Polyline command converts all selected Polygons into Polylines. Complex areas are converted into multiple polylines - one curve for each polygon in the area. The line style of each polygon is copied to the newly created polylines. You can assign IDs in the Object Manager or Property Manager.

The area on the left has been

converted to a curve (right).