 <em>&lt;comp&gt;</em></td> 
              <td align="left">Remove the component <em>&lt;comp&gt;</em> of the coordinates. <em>&lt;comp&gt;</em> must be smaller than the number of components.</td>
            </tr>
            <tr>
              <td id="ch"><code><strong>-ch</strong></code> <em>[&lt;tdim&gt;,&lt;old1&gt;,&lt;new1&gt;,...&lt;oldn&gt;,&lt;newn&gt;]</em></td> 
              <td align="left">Specify the references to change in the mesh. The changes will only be applied to element groups of topo