# FullscreenWindow

> Fullscreen window.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.0/script-reference/unityeditor.md)
* **Assembly:** UnityEditor

> **Warning:**
>
> **Deprecated.** D3D9 support has been removed

```csharp
FullscreenWindow = 1
```

### Remarks

In this mode, Unity will create a window which is covering the whole screen. It will always run at desktop resolution, and other requested resolutions will be scaled up. OS UI will correctly show on top of the fullscreen window (such as IME input windows).