# Opacity

> The opacity multiplier applied to the transition.

## Definition

* **Type:** Property
* **Namespace:** [Unity.GraphToolkit.Editor](/engine/6000.7/script-reference/unity/graphtoolkit/editor.md)
* **Assembly:** UnityEditor

```csharp
float Opacity { get; set; }
```

### Remarks

The opacity multiplier is clamped to the \[0, 1] range when set. On a transition between two states, this property fades the transition wire and leaves the arrow solid. On a self transition, this property fades the transition arrow's border, leaving the arrow head solid.

### Examples

```csharp
ITransition startTransition = myStateMachine.GetTransitions(startState, nextState).First();
startTransition.Opacity = 0.5f;
```