            </tr>
            <tr>
                <td class="legend-control-column">S1</td>
                <td class="legend-explanation-column">Toggle inspector.</td>
            </tr>
            <tr>
                <td class="legend-control-column">S2</td>
                <td class="legend-explanation-column">Note editor.</td>
            </tr>
            <tr>
                <td class="legend-control-column">S3</td>
                <td class="legend-explanation-column">Automation editor.</td>
      