> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fabl.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# Resolume Arena

> Trigger clips and columns in Resolume Arena from your rundown, set layer and clip opacity, bypass or solo layers, drive effect parameters, and select decks.

The **Resolume Arena** device controls [Resolume Arena](https://resolume.com/software/avmixer), so your rundown can fire the visuals for an item and fade them out again when it comes off air.

## Connection

Provide the **host**, the **OSC port** used to send commands, and the **REST port** Fabl reads state back from.

## Commands

| Command              | What it does                                   |
| -------------------- | ---------------------------------------------- |
| Connect clip         | Triggers a clip in a layer                     |
| Trigger column       | Triggers a column across the whole composition |
| Clear layer          | Disconnects a layer's active clip              |
| Set layer opacity    | Sets a layer's video opacity, from 0 to 1      |
| Set clip opacity     | Sets a clip's video opacity, from 0 to 1       |
| Bypass layer         | Bypasses a layer, or takes it out of bypass    |
| Solo layer           | Solos a layer, or un-solos it                  |
| Set effect parameter | Sets an effect parameter on a layer to a value |
| Select deck          | Selects a deck by index                        |

Layers, columns, and clips are addressed by their 1-based index, matching the numbering shown in Resolume.

<Tip>
  **Trigger column** fires a whole look at once across every layer, which is usually what a rundown item wants — firing clips layer by layer can leave the composition briefly mismatched.
</Tip>

## State and triggers

The device reports its connection state, whether Resolume is reachable, and which layers are bypassed. A trigger fires when the connection changes.