Disconnect a Surface with the action bar command
-
From the Idealize section of the action bar, click Disconnect
.
- In the Face/Surface to disconnect box, select the surface to disconnect.
- In the Disconnecting wire box, select a wire to disconnect.
The Surface is disconnected and Disconnect.x node is added to the tree.

Note:
If you edit and change the disconnecting wire, the naming or color
applied to the result's faces may be modified.