selection</td>
    </tr>
    <tr>
      <td>
        <kbd class="compound">
          <kbd>Ctrl</kbd>+<kbd>F</kbd>
        </kbd>
      </td>
      <td>Fill selection</td>
    </tr>
    <tr>
      <td>
        <kbd class="compound">
          <kbd>Ctrl</kbd>+<kbd>S</kbd>
        </kbd>
      </td>
      <td>Surround selection with walls</td>
    </tr>
    <tr>
      <td>
        <kbd class="compound">
          <kbd>Ctrl</kbd>+<kbd>R</kbd>
        </kbd>
      </td>
      <td>Crop level to selection</td>
  