Multiviewer

A Multiviewer displays multiple video sources side by side on a single screen, functioning as a command centre for monitoring inputs and scenes during a live show. Composer's Multiviewer can show up to 13 sources at once, supports up to 4 overlays per multiviewer, indicates Program / Preview state with tally lights, and is fully drivable from Connectors, the Script Engine, or the Companion app + Stream Deck.

Setup

1. Add a Switcher input from the Inputs & Scenes tab.
2. Add the Switcher input to a scene as a layer.
3. In the layer's Input Layer dropdown, choose Multiviewer.

Configuration

The Multiviewer's properties expose:

• Create Multi View — toggles the multiviewer on the chosen Switcher input.
• Multiview Layout — choose 8 inputs or 13 inputs layout. The 8-input layout is a 2 + 8 grid (large Program / Preview pair plus 8 small monitors); the 13-input layout adds a third row.
• Activate tally indicators — colours each tile red for Program and green for Preview.
• Activate VU-meters — overlays per-tile VU meters.
• PGM VU-meter source — names which channel feeds the Program VU.
• Input 1 … Input 13 — assign sources to tiles. The pipe character | lets you set a display alias separate from the input name (Camera1|CAM 1).

The 8-input layout:

The 13-input layout:

Overlays

Up to four overlays can be configured on each multiviewer with fade transitions of 0–5000 ms. Available actions per overlay:

• Fade In / Fade Out — animated, using the configured fade duration.
• Show — instant on.
• Hide — instant off.

Important — overlay resolution

Overlays must match the resolution of the Switcher input feeding the multiviewer; mismatched resolutions cause scaling artefacts and visible alignment problems.

Using the Multiviewer

Once configured, the Multiviewer is driven from three places:

• Connectors — the recommended path for external automation, control surfaces, and broadcast-board integration.
• Script Engine — programmatic control inside the project.
• Manual control — direct UI interaction in Composer Desktop.

Tip — Stream Deck

The Companion app, paired with a virtual or physical Stream Deck, gives you a hardware-button surface for triggering Multiviewer actions over the API or via Connectors. Useful for live operators driving a show without keyboard / mouse.

Latency note

When a multiviewer source is itself a scene (rather than a raw input), expect a one-frame processing delay through that source. Composer's audio / video sync tools can compensate when this matters for downstream targets.