Import DataDoctor > Geometry and Topology Structure Tree > To Detach a Surface
  
To Detach a Surface
1. Select one or more surfaces from the same component.
2. Click Detach on the Structure tab. Alternatively, right-click in the graphics window and click Detach. When you select only one surface to detach, all two-sided edges of the surface are broken into pairs of one-sided edges. When you select two or more surfaces to detach, two-sided edges common to the detached surfaces are maintained in the detached component, but all other two-sided edges are broken into pairs of one-sided edges. The wireframe is updated and the wireframe pieces corresponding to the broken two-sided edges are deleted.
The explicitly activated surfaces are deactivated after they are detached, but they remain selected to facilitate activation if required. You can view the detached surfaces in their deactivated and selected state in the Geometry and Topology Structure (GTS) Tree. Right-click the detached surfaces and click Activate to activate them, if required. The detached surfaces are moved to the top-level node in the Geometry and Topology Structure (GTS) Tree.
An active component or an active surface set is required to display wireframes and manipulate them. Topological connections in addition to wireframes are visible for an active set of surfaces. If only a singlecomponent node remains on the GTS tree, excluding the Datums Bin and Exclude Bin, the component is active by default. When you create another top-level node, no component is active by default. Therefore, after detaching one or more surfaces, you must either explicitly activate the original component or the component created by the detach operation to view or manipulate the wireframe.
 
* The Detach command is not available for surfaces selected across components.