# DrawHandle()

> A function to display this instance in the current handle camera using its current configuration.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor.IMGUI.Controls](/engine/6000.7/script-reference/unityeditor/imgui/controls.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public void DrawHandle()
```

### Remarks

Always write properties to the handle before calling this function. Place the calls to this function inside [EditorGUI.BeginChangeCheck](/engine/6000.7/script-reference/unityeditor/editorgui/beginchangecheck.md) and [EditorGUI.EndChangeCheck](/engine/6000.7/script-reference/unityeditor/editorgui/endchangecheck.md) to detect user interaction and read the updated properties from the handle.

The following component defines an object with a [Bounds](/engine/6000.7/script-reference/unityengine/bounds.md) property.

```csharp
using UnityEngine;

public class BoundsExample : MonoBehaviour
{
    public Bounds bounds { get { return m_Bounds; } set { m_Bounds = value; } }
    [SerializeField]
    private Bounds m_Bounds = new Bounds(Vector3.zero, Vector3.one);
}
```

The following Custom Editor allows the user to edit the bounds property for this component in the Scene view.

```csharp
using UnityEditor;
using UnityEditor.IMGUI.Controls;
using UnityEngine;

[CustomEditor(typeof(BoundsExample)), CanEditMultipleObjects]
public class BoundsExampleEditor : Editor
{
    private BoxBoundsHandle m_BoundsHandle = new BoxBoundsHandle();

    // the OnSceneGUI callback uses the Scene view camera for drawing handles by default
    protected virtual void OnSceneGUI()
    {
        BoundsExample boundsExample = (BoundsExample)target;

        // copy the target object's data to the handle
        m_BoundsHandle.center = boundsExample.bounds.center;
        m_BoundsHandle.size = boundsExample.bounds.size;

        // draw the handle
        EditorGUI.BeginChangeCheck();
        m_BoundsHandle.DrawHandle();
        if (EditorGUI.EndChangeCheck())
        {
            // record the target object before setting new values so changes can be undone/redone
            Undo.RecordObject(boundsExample, "Change Bounds");

            // copy the handle's updated data back to the target object
            Bounds newBounds = new Bounds();
            newBounds.center = m_BoundsHandle.center;
            newBounds.size = m_BoundsHandle.size;
            boundsExample.bounds = newBounds;
        }
    }
}
```

Additional Resources: [Editor.OnSceneGUI()](/engine/6000.7/script-reference/unityeditor/editor/onscenegui.md), [Handles.SetCamera](/engine/6000.7/script-reference/unityeditor/handles/setcamera.md).