You can permanently remove the AutoCAD objects that surface definition items are derived from without deleting the surface definition item.
For all surface definition items that are derived from AutoCAD objects, ensure that the surface build parameter Copy Deleted Dependent Objects is set to Yes. Then you can graphically select and delete the AutoCAD object while preserving the surface definition.
Also, you can use the Prospector list view to delete the AutoCAD objects from which the boundaries and breaklines are derived.
To delete AutoCAD objects from the drawing graphically
- In the drawing area, select the object and press Delete.
Note
If you want to delete an AutoCAD object, and not delete the surface definition item ensure that the Copy Deleted Dependent Objects option in the surface definition is set to Yes. For more information, see Editing and Viewing the Surface Definition.