Hi,
You can set default options for a specific component globally:
https://jsfiddle.net/BlackLabel/3etranh5/
It's also possible to define custom components that inherit from the original ones, with specified default options and to add them to the sidebar. See:
https://www.highcharts.com/docs/dashboa ... -component
If you have any further questions or need more details, feel free to ask!
Best regards,