Creating and Using a Filter Subcategories
Use filter subcategories to organize long lists of filters and ease browsing.
Filters, filter groups, and filter subcategories can be used to represent naturally hierarchical filter sets, such as geographic regions, scientific taxons, and product version lists.
Create a filter group
Start with the broadest term to describe your set of filters. This term will be the heading for all the filters that come under it, so it should be clear and distinct from other filter groups. Use a label prefix.
Creating a filter
The next
Create a subcategory
Click on the gear icon to the right of the filter.