# JS API Reference

# Welcome to the Highcharts JS 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.

# chart.parallelAxes.opposite

Whether to display the axis on the opposite side of the normal. The normal is on the left side for vertical axes and bottom for horizontal, so the opposite sides will be right and top respectively. This is typically used with dual or multiple axes.

In Highstock 1.x, the Y axis was placed on the left side by default.