Transform menu: Mirror tool

What is the Mirror tool?

You can use the Mirror tool to mirror bodies or faces across a selected plane to create symmetrical 3D geometry.

To mirror sketch items, use the Mirror tool in the Sketch menu.

How to use the Mirror tool

To mirror 3D geometry:

1. Go to Transform > Mirror.
   For other ways to access tools, visit Accessing tools.
2. Select the bodies or faces you want to mirror. Selected geometry is highlighted and marked with a selection badge.
3. Select a plane, planar face, or other supported reference to define the Mirror Plane. The selected mirror reference is highlighted in purple.
4. Optional: Turn off Keep Original to remove the original geometry after mirroring.
5. Optional: To adjust settings while the tool is active, select Mirror again to open the parameter card.
6. To finish, select Done.

Parameter Card and History Settings

Shapr3D records the tools you use as steps in History, allowing you to revisit and modify them later. Each History step stores its parameters, which you can access through the parameter card. You can adjust these parameters while using the tool or reopen the parameter card from History after completing the step.

Adjust Mirror parameters

While using Mirror, select Mirror again to open its parameter card and adjust the following:

• To Mirror – Select or change the geometry to mirror.
• Mirror Plane – Select or change the plane or reference used to mirror the geometry.
• Keep Original – Turn on to retain the original geometry alongside the mirrored result. Turn off to keep only the mirrored result.

To learn more about parameter cards, visit Parameter Cards.

Edit Mirror in History

To adjust a completed Mirror operation:

1. Open the History sidebar.
2. Select the Mirror step to reopen its parameter card.
3. Adjust the parameters as needed.
4. To finish editing, click anywhere in an empty area of the modeling space.

To learn more about editing modeling steps, visit History.

When to use the Mirror tool

The Mirror tool is useful for creating:

• Symmetrical parts – Create mirrored bodies for balanced components or assemblies.
• Matching features – Reflect faces or geometry to the opposite side of a model.
• Alternative layouts – Create a mirrored version while retaining the original when needed.

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.