# Welcome to the Highcharts Maps JS (highmaps) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# drilldown.drillUpButton.theme

A collection of attributes for the button. The object takes SVG attributes like `fill`, `stroke`, `stroke-width` or `r`, the border radius. The theme also supports `style`, a collection of CSS properties for the text. Equivalent attributes for the hover state are given in `theme.states.hover`.

In styled mode, drill-up button styles can be applied with the `.highcharts-drillup-button` class.