Topic Window Buttons The Topic window contains several aids to help you navigate through a book. The topic label area at the top of the window shows the name of the section you are currently viewing. By clicking on the function buttons at the bottom of the window, you can move quickly through the sections. Closes the Topic window. Returns to previous sections you have read. Goes to the next or previous sequential section. Scrolls the window to view information be- yond the top or bottom of the window or the next topic.