# Scale Constraint component

> Constrain a GameObject's scale to match one or more source objects.

A Scale Constraint component resizes a GameObject to match the scale of its source GameObjects.


**Scale Constraint component:**
![](/api/media?file=/engine/6000.7/media/images/ScaleConstraint.png)

## Properties

| **Property**  | **Description**                                                                                                                                                                                                                                                                                                 |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Activate**  | After you resize the constrained GameObject and its source GameObjects, click **Activate** to save this information. **Activate** saves the current offset from the source GameObjects in **Scale At Rest** and **Scale Offset** then enables **Is Active** and **Lock**.                                       |
| **Zero**      | Sets the rotation of the constrained GameObject to the source GameObjects. **Zero** resets the **Scale At Rest** and **Scale Offset** fields then enables **Is Active** and **Lock**.                                                                                                                           |
| **Is Active** | Enable to evaluate the Constraint. To also apply the Constraint, make sure **Lock** is enabled.                                                                                                                                                                                                                 |
| **Weight**    | The strength of the Constraint. A weight of 1 causes the Constraint to resize this GameObject at the same rate as its source GameObjects. A weight of 0 removes the effect of the Constraint completely. This weight affects all source GameObjects. Each GameObject in the **Sources** list also has a weight. |

### Constraint Settings

| **Property**          | **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| --------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Lock**              | Enable to let the Constraint resize the GameObject. Disable this property to edit the scale of this GameObject. You can also edit the **Scale At Rest** and **Scale Offset** properties. If **Is Active** is enabled, the Constraint updates the **Scale At Rest** or **Scale Offset** properties for you as you resize the GameObject or its Source GameObjects. When you are satisfied with your changes, enable **Lock** to let the Constraint to control this GameObject. This property has no effect in Play Mode. |
| **Scale At Rest**     | The X, Y, and Z values to use when **Weight** is 0 or when the corresponding **Freeze Scale Axes** is not enabled. To edit these fields, disable **Lock**.                                                                                                                                                                                                                                                                                                                                                              |
| **Scale Offset**      | The X, Y, and Z offset from the transform that is imposed by the Constraint. To edit these fields, disable Lock.                                                                                                                                                                                                                                                                                                                                                                                                        |
| **Freeze Scale Axes** | Enable X, Y, or Z to allow the Constraint to control the corresponding axes. Disable an axis to stop the Constraint from controlling it. This allows you to edit, animate, or script the unfrozen axis.                                                                                                                                                                                                                                                                                                                 |

### Sources

The list of GameObjects that constrain this GameObject. Each source has a weight from 0 to 1.