on would have on the label but do not actually do it</td>
    <td valign="center" align="center">No</td>
    <td valign="top" align="center">-n</td>
  </tr>
  <tr>
    <td valign="top">add</td>
    <td valign="top">If set to true, preserve files which exist in the label, but not in the current view</td>
    <td valign="center" align="center">No</td>
    <td valign="top" align="center">-a</td>
  </tr>
  <tr>
    <td valign="top">delete</td>
    <td valign="top">If set to true, remove from the label the files