You can navigate through this tutorial by clicking various links. To navigate in a linear fashion, click "next" after you are finished with each page. If you prefer to navigate in a nonlinear fashion, use the table of contents on the left of every main page to jump between topics.
"Hot words" are linked words in the text that go to the glossary for easy access to their definitions. When the glossary or other "pop-up" windows appear, close them by clicking the "x" in the upper right corner of the pop-up window (or the square in the upper left for Macintosh users) or by using the "close window" link. You can move the pop-up window on the computer screen by clicking on the top bar and dragging to desired location.