>
      <td>
        <span class="group">
          <kbd class="compound">
            <kbd>Ctrl</kbd>+<kbd>-</kbd>
          </kbd> / <kbd>=</kbd> or
        </span>
        <span class="group">
          <kbd>PgUp</kbd> / <kbd>PgDn</kbd> or
        </span>
        <span class="group">
          <kbd>kp -</kbd> / <kbd>kp +</kbd>
        </span>
      </td>
      <td>Previous/next level</td>
    </tr>
  </tbody>

  <tbody>
    <tr>
      <td>
        <span class="group">
          <kbd>U</kbd><span class="a