
        A callback <code>function</code> can be passed as an optional parameter. This function will be called at the end of zoomIn function.
      </td>
    </tr>
    <tr>
      <td>zoomOut(percentage [, options, callback])</td>
      <td>none</td>
      <td>Zoom out the current visible window. The parameter <code>percentage</code> can be a <code>Number</code> and must be between 0 and 1. If the parameter value of <code>percentage</code> is null, the window will be left unchanged. Available options:
      