<th>trail_length</th>
      <td><p>the length of trail of each arc</p></td>
    </tr>
    <tr>
      <th>tilt</th>
      <td><p>value to tilt the arcs to the side, in degrees [-90, 90]</p></td>
    </tr>
    <tr>
      <th>height</th>
      <td><p>value to multiply the height.</p></td>
    </tr>
    <tr>
      <th>tooltip</th>
      <td><p>variable of <code>data</code> containing text or HTML to render as a tooltip</p></td>
    </tr>
    <tr>
      <th>auto_highlight</th>
      <td><p>logical indicating if 