> For the complete documentation index, see [llms.txt](https://tractus.gitbook.io/tractus-tools-for-ndi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tractus.gitbook.io/tractus-tools-for-ndi/getting-started/setting-output-resolution-and-frame-rate.md).

# Setting Output Resolution & Frame Rate

Each multiview output can have its own resolution and frame rate. This can be changed via the API or through the web interface.

## Web UI

<figure><img src="/files/CvPvywdMpoko1eEffKfA" alt=""><figcaption><p>The resolution &#x26; frame rate adjustments are along the right-hand toolbar.</p></figcaption></figure>

### Change Resolution in the Web UI

1. Select the multiview output you want to edit.
2. Click *Edit Layout*
3. Under the resolution section on the right, set the **Width** and **Height** of your viewer - or select a size template.
4. Click *Set New Dimensions*.&#x20;

The multiview will take on the dimensions you provide.

{% hint style="warning" %}
**Caution**: The multiview will not automatically scale your sources or captions. It is up to you to update your layout. Future versions may include a scaling feature.
{% endhint %}

### Change the Frame Rate

1. Select the multiview output you want to edit.
2. Click *Edit Layout*
3. Under the frame rate section on the right, set the **frame rate numerator** and **frame rate denominator** of your viewer - or select an FPS template.
   1. Example 1: For 60fps, enter 60 as your numerator, and 1 as your denominator.
   2. Example 2: For 59.94fps, enter 60000 as your numerator, and 1001 as your denominator.
4. Click *Set New Framerate*.&#x20;

The multiview will take on the frame rate you provide.

{% hint style="info" %}
**Note:** A lower frame rate gives Multiview for NDI more time to realize each frame. If you're using a slower computer, consider reducing the frame rate to 30 fps.
{% endhint %}

## HTTP API

### Change Resolution using the HTTP API

Using the API, compose a `GET` request to `http://[host]:8901/viewer/{viewerNum}/resolution/{width}/{height}`.

For example, the following will change the first viewer's resolution to 3840x2160.

`http://localhost:8901/viewer/0/resolution/3840/2160`

### Change Frame Rate using the HTTP API

Using the API, compose a `GET` request to `http://[host]:8901/viewer/{viewerNum}/fps/{num}/{den}`.

For example, the following will change the first viewer's frame rate to 59.94 fps.

`http://localhost:8901/viewer/0/fps/60000/1001`&#x20;