# 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.alignTicks

When using multiple axis, the ticks of two or more opposite axes will automatically be aligned by adding ticks to the axis or axes with the least ticks, as if `tickAmount` were specified.

This can be prevented by setting `alignTicks` to false. If the grid lines look messy, it's a good idea to hide them for the secondary axis by setting `gridLineWidth` to 0.

If `startOnTick` or `endOnTick` in an Axis options are set to false, then the `alignTicks` will be disabled for the Axis.

Disabled for logarithmic axes.