title: Highcharts tooltip x axis font size
body: <p>from the highcharts api it says we can edit the fontsize in the tooltip, however, this only edits the values and not the x axis label.</p>
  
  <p><a href="https://i.stack.imgur.com/Zw0bC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Zw0bC.png" alt="enter image description here"></a></p>
  
  <p>Is there a way to increase the size of the Tuesday, May 17... etc as well? i.e. the x axis label?</p>
  
  <p>Editing the real xaxis label did not work.</p>
  
  <p>Thanks! :)</p>