You may view the entire list of references by clicking on the references entry in the table of contents. The start icon displays single frame images and figures, while the play icon displays an animation. The bottom of each text page contains markers to send you to the top of the current chapter, back one chapter, and ahead one chapter. There are occasional references to previous and future chapters in the text. When the word chapter and the accompanying number are underlined you may click on the word and go directly to that chapter.
Some chapters contain audio segments.
An audio segment is indicated by the following symbol. You may jump ahead in a sound segment using the jump forward button or slider. You may jump back in a sound segment using the jump back button or slider. The volume may be decreased from your computer's current setting by clicking on the volume button and adjusting the volume control. The content of this package has been organized so that background material and underlying principles are introduced first in separate chapters.