Pre-defined Keyword Lists, are available as options in the Keyword Lists section of the Keywords filter. Checking a list will search for all keywords in that list.
Clicking Manage Lists will open the keyword list management interface. See Managing Keywords for more details.
To see all keywords in a pre-defined Keyword List highlighted on the Highlighted tab, select a Keyword List from the Keyword Lists drop down. When searching for ad-hoc search terms and a keyword list is selected, all words in the list plus the terms in the ad-hoc search are highlighted. In the example below, all terms in the Keyword List titled "Responsive Terms" that exist in the selected document(s) are highlighted.