Customizing charts in Splunk

[fjp2485]

Hi,

We have to customize some visualization in Splunk, e.g. to change width of column in a column chart or change number of decimal digits in pie chart. We know that Splunk uses Highcharts component inside and in a standalone Highcharts HTML file we are able to do the required modification in JavaScript code. But we cannot do the same in Splunk, because Highcharts is totally hidden inside it. The only part we need is the charts array of Highcharts.
Could you tell me how can I get it, please?

We are using Splunk Enterprise 7.2.3 and if I'm correct it uses Highcharts 4.0.4 (or 5.0.12 ?)

Thanks in advance,
fjp2485