These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Custom or override icons for the grid. Keys are icon names (either built-in names from the default registry or custom names). Values are either an SVG definition object or a raw SVG markup string. Built-in icons can be overridden; new names can be used for custom icons and referenced where an icon name is accepted (e.g. menu items, pagination buttons).