 or HTML to render as a tooltip</p></td>
    </tr>
    <tr>
      <th>auto_highlight</th>
      <td><p>logical indicating if the shape under the mouse should auto-highlight</p></td>
    </tr>
    <tr>
      <th>highlight_colour</th>
      <td><p>hex string colour to use for highlighting. Must contain the alpha component.</p></td>
    </tr>
    <tr>
      <th>layer_id</th>
      <td><p>single value specifying an id for the layer. Use this value to
distinguish between shape layers of the same type. Layers wit