To view PDF files, Acrobat Reader is required. Downloadable from http://get.adobe.com/reader/.
If you find the text size too small for you to read, you can enlarge the page by using the following controls:
In Windows Internet Explorer 6, use the View > Text Size menu.
In Windows Internet Explorer 7, use the Page > Zoom menu.
In Windows Internet Explorer 8 & 9, use the Page > Zoom menu.
In Macintosh Internet Explorer and Netscape 6 and 7, use the View > Text Zoom menu.
In Opera, use the Zoom selector (bottom right of window).
In Safari, use the ctrl + and – keys.
In Firefox, use the ctrl + and – keys.
If you use a wheel-mouse, you may be able to change the text size by holding down the Control or Command key and turning the wheel. In some browsers you can change the text size using Control or Command and the + and – keys.