Create and modify 3D models > Modify 3D geometry > Change a part > Mirror a part
  
Mirror a part
You can mirror one or more parts or assemblies in a freely definable mirror plane. This positions a mirrored version of a part on the opposite side of the mirror plane. You can choose whether to keep the original part.
To mirror an assembly without creating new parts, use the Mirror command in the Modify 3D menu.
To create a mirrored copy of an assembly and create shared instances for symmetric parts, use the Mirror command in the Part & Assy menu.
To mirror a part in the Modify 3D menu,
1. Click Modeling and then, in the Modify 3D group, click More.
2. Click Mirror in the Modify section. The Mirror Part dialog box opens.
3. Click Parts and select the part or assembly from the structure browser.
4. Click Mirror Plane and click in the viewport to define the mirror plane.
5. Click Copy if you would like to keep the original part or assembly after mirroring.
To assign a new owner, click New Owner and select an assembly from the structure browser.
6. Click Check for symmetry to check for and use, if possible, position operations instead of mirror operations. Positioning instead of mirroring can make parts and assemblies sharable.
If you click Check for symmetry, the following options appear:
* 
Check for symmetry is not selected by default.
Click Extended search to recognize symmetrical assemblies capable of being mirrored by the repositioning and permuting of parts. If Extended search is turned off, the reposition analysis is done only on the part level by analyzing the positions of the original and the mirrored part.
Click Consider only parts to ignore workplanes, docuplanes, and layouts during the symmetry analysis of assemblies.
Click Ignore 3D Lib to copy a Part Library part when you mirror a part or an assembly. By default, a Part Library part is not copied.
Click Report symmetric objects to view the results in the output dialog.
7. Click Check Acc to specify an accuracy for the symmetry check.
8. Click OK to complete the operation.
To mirror a part in the Part & Assy menu,
1. Click Structure and then, in the Part & Assembly group, click Mirror. The Mirror Part dialog box opens.
2. Click Parts and select the part or assembly from the structure browser.
3. Click Mirror Plane and click in the viewport to define the mirror plane.
4. Click NewOwner to specify a new owner for the part.
5. Click Name to specify a name for the part.
6. Click Check for symmetry to check for and use, if possible, position operations instead of mirror operations. Positioning instead of mirroring can make parts and assemblies sharable.
* 
Check for symmetry is selected by default. If you clear the Check for symmetry check box, the following options disappear.
Click Extended search to recognize assemblies.
Click Consider only parts to ignore workplanes, docuplanes, and layouts during the symmetry analysis of assemblies.
Click Ignore 3D Lib to copy a Part Library part when you mirror a part or an assembly. By default, a Part Library part is not copied.
Click Report new objects to view the results in the output dialog.
7. Click Check Acc to specify an accuracy for the symmetry check.
8. Click to complete the operation.
Limitations
You can mirror workplanes, docuplanes, and layouts, if they belong to an assembly, though these objects may influence the result if Check for symmetry is on. Animations and relations cannot be mirrored correctly.
The mirror command without symmetry detection does not work for parts or assemblies involving library parts (read only parts), which are shared by default during a copy operation. The mirror command with symmetry detection can work for parts or assemblies involving library parts, only if the library parts are symmetric with respect to the mirror operation.