Learn how to use Mirror to create symmetrical sketch geometry.
What is the Mirror tool?
You can use the Mirror tool to mirror sketch items across a selected line or plane to create symmetrical sketch geometry.
To mirror 3D geometry, use the Mirror tool in the Transform menu.
How to use the Mirror tool
To mirror sketch items:
- Within an existing sketch, go to Sketch > Mirror.
For other ways to access tools, visit Accessing tools. - Select the sketch items you want to mirror.
- Select the line or other available reference you want to mirror across. The selected reference defines the position of the mirrored sketch items.
- Review the mirrored geometry in the preview.
- To finish, select Done.
History settings
Mirroring sketch items does not create a separate Mirror step in History. You can still reopen the existing Sketch step to review or modify its settings:
- Plane – Select Edit… or Select… to change the plane or face containing the sketch, then select Done.
- Projection – If applicable, select Edit… to modify existing projections in the sketch.
When to use the Mirror tool
The Mirror tool is useful for creating:
- Symmetrical profiles – Mirror one side of a sketch to create matching geometry on the other side.
- Repeated features – Position matching openings, outlines, or details on opposite sides of a centerline.
- Design revisions – Reflect existing sketch geometry without redrawing it.
Best practices and troubleshooting
- Select the geometry you want to mirror before choosing the mirror reference.
- Use a clearly defined centerline or plane to position the mirrored geometry accurately.
- Review the preview before finishing the operation.
| Issue | What to check |
|---|---|
| The mirrored sketch is on the wrong side. | Check the selected mirror reference and its position relative to the sketch items. |
| Unexpected sketch items are mirrored. | Review the selected sketch items before completing the tool. |
Read more
- Accessing tools – Understand how tools appear based on what you select in the modeling space.
- Selecting geometry – Master selection techniques for edges, faces, sketches, and bodies.
- Defining and calculating numerical values – Learn how to apply dimensions, enter precise values, and use formulas.
- Keyboard shortcuts, gestures, and hotkeys – View keyboard shortcuts you can use to access tools and speed up actions.
- Variables and expressions – Set up reusable values and expressions to control your design parametrically.