This tab panel can be navigated fully by keyboard. You can use the TAB key to give focus to panel tab header, and use the LEFT ARROW to collapse, the RIGHT ARROW to expand, or the SPACE BAR to toggle. Each tab panel contains a tree of checkboxes that can be selected to further refine your search results.

This is a tree view of search filter categories that can be checked/unchecked to filter your search results. You can navigate the tree with the keyboard by using LEFT ARROW to collapse a category, RIGHT ARROW to expand a category, or SPACE BAR to select There are links to select all or unselect all after the tree.