> For the complete documentation index, see [llms.txt](https://zerodensitydocumentation.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zerodensitydocumentation.gitbook.io/docs/realityhub-1.3/realityhub-1.3/launcher/engine-display-window.md).

# Engine Display Window

In RealityHub terminology, Engine Display Window refers to the separate **scene-preview window** activated on the **Engine Host** when an engine is launched via Launcher Module. 

{% hint style="info" %}
This window is sometimes called the Game Preview Standalone or the Render Preview Output.
{% endhint %}

<div align="left"><img src="/files/ri3V8gNVJy2UyRV4nqfP" alt="Reality Engine Display Window. (Image courtesy of Virtual Line Studios &#x26; ASK Co.)"></div>

If your **Reality Engine** scene is successfully launched, RealityHub launches a **scene preview** in a separate window on the [Engine Host](/docs/realityhub-1.3/realityhub-1.3/installation-and-configuration/configuration-steps/engine-module-configuration/adding-host.md)**,** as shown in the image above.

<div align="left"><figure><img src="/files/UBR3qhkggGcNykRsceA7" alt=""><figcaption><p>Unreal Engine Display Window</p></figcaption></figure></div>

Launching an Unreal Engine scene via RealityHub also creates an Engine Display Window on the Engine Host but in **full screen.**&#x20;

{% hint style="info" %}
To disable the full screen for more control on the Render Output Window, click SHIFT + F11 on your keyboard.
{% endhint %}

{% hint style="warning" %}
Closing **the** Engine Display Window **stops your Engine**.
{% endhint %}

{% hint style="warning" %}
Minimizing the Reality Engine display window might affect your performance. You can **leave it aside** or **keep it in the background**.
{% endhint %}

Instead of going back and forth to the Engine Display Window to check your scene, you can utilize the **Advanced Preview Monitor** feature without leaving the RealityHub interface.&#x20;

* For Reality Engine, see [Advanced Preview Monitor](/docs/realityhub-1.3/realityhub-1.3/nodegraph-actions/nodegraph/advanced-preview-monitor.md)&#x20;
* For Unreal Engine, please visit [Advanced Preview Monitor for Unreal Engine](/docs/realityhub-1.3/realityhub-1.3/controlling-unreal-engine/unreal-engine-5.1/ustate/apm-for-unreal-engine-5.1.md)&#x20;


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