></td>
</tr>

<tr>
<td class="org-left"><b>z</b></td>
<td class="org-left">Zoom to show the selection, or the whole problem if no selection</td>
</tr>

<tr>
<td class="org-left"><b>a</b></td>
<td class="org-left">Select every un-forbidden candidate</td>
</tr>

<tr>
<td class="org-left"><b>A</b></td>
<td class="org-left">Flip the selection (select unselected, and deselect selected)</td>
</tr>
</tbody>
</table>
</div>
</div>

<div id="outline-container-org592999f" class="outline-3">
<h3 id="org592999f"><span 