To generate symmetric copies of the model selection about a plane, use the following procedure.

1. Select the geometry to copy or move.
   Note: Refer to the discussion on the Select menu for details on the selection procedure.
2. On the Geometry ribbon tab, select the Mirror tool in the Structure group.
   
   The Mirror dialog opens.
3. Specify an mirror plane.
4. Specify a Plane position.
5. Select if the selected geometry is to be copied of moved and, if copied, if linking members are to be created.
6. (Optional) Set the option to mirror members if their orientation is also to be mirrored.
7. Click OK.