Wherever you see text underlined, it means that you can click on it and there will be further explanations or information that will come onto your screen. After clicking it, it will turn this colour to indicate you have been there. To get back to the screen you just left click the yellow button in the right hand corner of the page
Wherever you see a line of text underlined with www. in front it means it is a link to someone else's web site. By clicking on it you will open up their web page. To return to this one, simply click on the back button (arrow) at the top left of your computer window.