Show: History The History Window contains a record of all searches performed during the current session. Each search is represented by a Q_nn (Query-underline-number) followed by the words and numbers used in the search. Expanded Words are represented in the History Window by Q_nn followed by the top-ranked words produced by the Expansion. To activate or deactivate the History Window, move your mouse pointer to History and click. The History Window is only found in the Show Pulldown Menu, and does not appear in the Lights Toolbox Menu. (See History Window in this Help system)