You can create symmetry of the created features by using the “Mirror Feature” command on the “Home Ribbon Bar” as marked in the figure.

To create symmetry of the feature:
- Start the “Mirror Feature” command.
- The “Select Feature” in the dialog box is highlighted automatically when the dialog box is opened.
- Select one or more features to mirror
- Activate the “Select Plane” in the dialog box.
- Click on the “Select Plane” bar in the dialog box.
- One-click on the middle mouse button. The “Select Plane” bar will be highlighted.
- Select plane or planar face.
- A point will appear on the symmetry location.
- Click the “Ok” button to create symmetry and exit the command.