iv></td>
    <td><div align="left">File&nbsp;Open</div></td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr> 
    <td><div align="center"><strong>P</strong></div></td>
    <td><div align="left">Step&nbsp;Button</div></td>
    <td><div align="center"><strong>P</strong></div></td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr> 
    <td><div align="center"><strong>Q</strong></div></td>
    <td>&nbsp;</td>
    <td><div align="center"><strong>Q</strong></div></t