Part Modeling > Edit Features > Mirror > To Mirror Geometry
  
To Mirror Geometry
1. Select either Geometry or Datums in the selection filter at the bottom right of the Creo window.
2. Select any geometry or datum.
3. Click Model > Mirror. The Mirror tab opens.
4. Select a mirror plane. A preview of the new Mirror feature appears in the graphics window.
 
* You can redefine the Mirror plane by clicking any other plane in the graphics window.
5. To hide the original mirror geometry, click the Options tab, and select the Hide original geometry check box.
6. Click .
 
* To redefine the mirror item, click the Mirror items collector on the References tab and select alternate items to mirror.