# transformChangeMode

> Defines when changes to Transform that has are registered with PhysicsWorld.RegisterTransformChange are called. NOTE: In the Unity Editor when not in Play Mode, Transform change callbacks are always and only sent at the start of the frame for authoring purposes. See PhysicsWorld.TransformChangeMode.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public PhysicsWorld.TransformChangeMode transformChangeMode { get; set; }
```