      </tr>
            <tr>
                <td class="legend-control-column">S4</td>
                <td class="legend-explanation-column">Device chain.</td>
            </tr>
            <tr>
                <td class="legend-control-column">S5</td>
                <td class="legend-explanation-column">Mixer.</td>
            </tr>
            <tr>
                <td class="legend-control-column">S6</td>
                <td class="legend-explanation-column">Toggle browser.</td>
            </tr>
       