Hello,
Thanks for contacting us with your question!
To change the range of an axis, just call the
setExtremes method.
API: https://api.highcharts.com/class-refere ... etExtremes
You might also consider using the navigator with a scroll function to make navigation easier.
API: https://api.highcharts.com/gantt/navigator.enabled
However, it will be easier for me to help you if you describe your problem in more detail, preferably by attaching a demo, e.g. in jsfiddle.
If I may clarify any issues/matters I am available at your convenience.
Best regards!