Use the drop-down menu to move from concept to concept within a chapter. Return to the unit menu to choose a different chapter. Return to the main menu to choose a different unit. Many figures are interactive. Actions you are to take are emphasized in bold in the caption.
Blue text indicates that a particular button has been chosen.
The Back button allows you to return to a previous image in the interaction or to rest the interaction. Each concept has a resource menu that lists related topics and glossary terms. Clicking on the name of a related topic will open a new window displaying the related concept. The related concept may be in another chapter, or even another unit. To return to the original concept, simply close the window that displays the related concept.