title: How to change fontsize on drawText?
body: <pre><code>QString str = QString::number((double)i, 'd', 1);
  painter-&gt;drawText(100 + i * 800/9 - 6, 910, 40, 40, 0, str );
  </code></pre>
  
  <p>I would like to increase fontSize to 2x what is showing?</p>