Plot font size</p></td>
    </tr>
    <tr>
      <th>alpha</th>
      <td><p>Line and marker opacity (default=0.7)</p></td>
    </tr>
    <tr>
      <th>x2Offset</th>
      <td><p>Vertical adjustment to secondary x-axis (default=6)</p></td>
    </tr>
    <tr>
      <th>pairedOnly</th>
      <td><p>Logical whether to only plot paired samples (default=TRUE)</p></td>
    </tr>
    <tr>
      <th>graphics</th>
      <td><p>Which graphic system to use (options = "base" or "ggplot")</p></td>
    </tr>
    <tr>
  