Complete Part Symmetry

This command on the Edit menu is an easy way to generate elements for the second half of a symmetrical part. If you are creating a custom shape that has an axis of symmetry, enter the elements up to and including the middle element. At this point, the Complete Part Symmetry command will copy each of the elements (except the middle element) in reverse order as mirrored elements. The middle element indicates the direction of the mirrored image. It is perpendicular to the axis of symmetry.