# `PATCH /labeltemplate/{id}`

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

Update label template (partial)

Updates specified fields of an existing label template for the selected company.
When `content`, `width`, or `height` is provided, the thumbnail is automatically re-rendered.

Also available as `PUT /labeltemplate/{id}`.

## Path parameters

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

## Body (JSON)

All fields are optional.

```json
{
  "name": "…",
  "width": 448,
  "height": 200,
  "dpi": 203,
  "type": "zpl",
  "content": {
    "objects": []
  }
}
```

| Field | Type | Description |
|-------|------|-------------|
| `name` | string | Template name |
| `width` | integer | Canvas width in pixels |
| `height` | integer | Canvas height in pixels |
| `dpi` | integer | Printer DPI — `203` or `300` |
| `type` | string | Template type — `"zpl"` |
| `content` | object | Label editor JSON content |

## Response `200`

Updated label template

```json
{
  "labeltemplate": {
    "id": 1,
    "company_id": 1,
    "name": "…",
    "width": 448,
    "height": 200,
    "dpi": 203,
    "type": "zpl",
    "content": {},
    "thumb": "…"
  }
}
```

## Errors

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

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