You can click on the arrows to move the page slowly in the direction you want, click and drag the button to move through the page quickly or click in the bar to move the page a screen at a time.
Some text is in a different colour.
This is called a hyperlink . When you point the mouse over this text, the arrow shape pointer changes into a hand. If you click once on the hyperlink, you can move to a new web page or sometimes to another section of the same page. Hyperlinks usually change colour once you have visited the link so that you will know that you have visited it before. At the top of the screen there are back and forward buttons - as you move from page to page or link to link you can retrace your steps.