"#Editing_Items">Editing Items</a> for a detailed explanation.
      </td>
    </tr>
    <tr parent="groupEditable" class="hidden">
      <td class="indent">groupEditable.add</td>
      <td>boolean</td>
      <td><code>false</code></td>
      <td>If true, new groups can be created in the Timeline. For now adding new groups is done by the user.</td>
    </tr>
    <tr parent="groupEditable" class="hidden">
      <td class="indent">groupEditable.remove</td>
      <td>boolean</td>
      <td><code>false</code></