Adjusting ticks and other chart elements

We can adjust the interval between the ticks that appear on the y axis by using the tickInterval property:

1. Modify the yAxis component from the previous example to set a difference of 1 between each tick:

   yAxis: {
     title: {
       text: 'Revenue (in U.S. billion dollars)'
     },
     tickInterval: 1
   }

2. We can also include HTML in our titles and other text properties by enabling the useHTML property. Let's point to the actual data source in our subtitle:

   subtitle: {
     text: 'Source: <a href="http://www.npd.com" title="NPD Group">NPD Group</a>; AFJV',
     useHTML: true
   }

3. Now, add a bit of CSS styling by using the style property:

   style: {
     color: '#000000',
     textDecoration: 'underline'
   }

The resulting chart from the previous modification will be like the following screenshot: