Extract loop

Use the Extract Loop command to untrim surface loops, exposing the underlying surface that is not trimmed by the original edges. You can optionally delete the wires from the original surface edges if they are not going to be used in repairing the surface. Then, you can use the edges of adjacent surfaces to trim the extracted surface. You can use Boundary Trim to generate and rebuild a new surface.

1. Data is translated into the construction environment, and the quality check command reports a bad loop on the highlighted surface in the construction environment.
   Note: Change the visibility of the surface to make selecting edges easier.
2. On the ribbon, click Construction tab Surface panel Extract Loop .
3. Select an edge of the surface which you want to be untrimmed. The arrow color in the Loop command changes from red to white.
4. To specify that the existing edges of the surface are to become new wires, make sure the Delete Wires check box is cleared. Otherwise, check the Delete Wires check box to use adjacent face edges for trimming.
5. Click Apply. The untrimmed surface is equivalent to the bounding size of the surface.
6. Select another surface edge to extract, or click Done.