Hi there,
Scroll option is a Highstock feature, so you need to link the
Highstock.js script to your HTML file, instead of standard
Highcharts.js
DEMO: http://jsfiddle.net/BlackLabel/ja0nwrs6/
https://jsfiddle.net/BlackLabel/wa48oyj1/
Alternatively if for some reason you don't want to use the Highstock module, please take a look at the example below with a
scrollablePlotArea
DEMO: https://jsfiddle.net/BlackLabel/e9ztx3k8/
When it comes to styling the labels, could you explain a bit further what exactly would you need to acheive? Do you need to style a whole level, or just a category?
In the meantime, take a look at the official documentation about styling specific levels (it's at the bottom of the page)
https://blacklabel.github.io/grouped_categories/
Waiting for your reply,
Best regards!