# OnKeyDown(KeyDownEvent)

> Handle key down event.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor.Experimental.GraphView](/engine/6000.6/script-reference/unityeditor/experimental/graphview.md)
* **Assembly:** UnityEditor

```csharp
protected void OnKeyDown(KeyDownEvent evt)
```

### Parameters

**** (\[KeyDownEvent]\(/engine/6000.6/script-reference/unityengine/uielements/keydownevent)): The event.