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# LayoutLayer

> Position, size, and state of a single video layer in a call layout.

Position, size, and state of a single layer in a video call layout. Layers are emitted by [`call.layoutLayers$`](/docs/browser-sdk/v4/reference/webrtc-call/layout-layers\$) and update whenever the server reflows the layout.

## **Properties**

**`height`** `number` — required

Layer height as a percentage (0–100) of the room canvas.

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**`layer_index`** `number` — required

Z-order index assigned by the media server.

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**`member_id`** `string`

ID of the member occupying this layer, if any.

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**`playing_file`** `boolean` — required

Whether a file (e.g. media playback) is currently rendered in this layer.

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**`position`** `VideoPosition` — required

Named position slot for this layer (e.g. `reserved-0`). See [`VideoPosition`](/docs/browser-sdk/v4/reference/type-aliases/video-position).

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**`reservation`** `string` — required

Reservation name if this layer is reserved for a specific member.

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**`visible`** `boolean` — required

Whether the layer is currently visible.

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**`width`** `number` — required

Layer width as a percentage (0–100) of the room canvas.

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**`x`** `number` — required

Layer x-coordinate (top-left corner) as a percentage (0–100) of the room canvas width.

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**`y`** `number` — required

Layer y-coordinate (top-left corner) as a percentage (0–100) of the room canvas height.

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**`z_index`** `number` — required

Stacking order; higher values render on top.

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> Position, size, and state of a single video layer in a call layout.