e Click</kbd> : Rotate through minimum, default and
  maximum value.</li>
  <li><kbd>Shift</kbd> + <kbd>Middle Click</kbd> : Take floor of current
  value.
  <ul>
  <li><strong>Note</strong>: For decibel (<code>dB</code>) parameters,
  floor is applied after the value is converted to amplitude.</li>
  </ul></li>
  </ul>
  <p>XY pad provides following controls:</p>
  <ul>
  <li><kbd>Ctrl</kbd> + <kbd>Left Click</kbd>: Reset value.</li>
  <li><kbd>Middle Drag</kbd>: Only Change X value.</li>
  <li><kbd>Mouse 