The Variable Search Tab, second from the left, is selected to show the search criterion. At the top of the tab is the horizontal criterion menu bar made up of three drop-down menus. Below the menu bar, the left third of the tab shows an expanded link tree with the topic Highest grade completed selected and the right two-thirds of the tab shows a list of related variables. Because a topic is selected in the link tree (having been clicked by the user), a summary line is added above the criterion menu bar labeled Selected Index is Highest grade completed making it the first listed criterion in this search example.