# `PUT /labeltemplate/{id}`

Protected. Requires a valid session cookie (`credentials: 'include'`).

Update label template

Replaces an existing label template.
When `content` (or `width`/`height`) is provided, the thumbnail is automatically re-rendered.


## Path parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `id` | yes | integer | Label template ID |

## Body (JSON)

```json
{}
```

## Response `200`

Updated label template

```json
{
  "labeltemplate": {}
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | Invalid input — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 404 | Label template not found — `{"error":"…"}` |

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