Internet Explorer 7 includes a zoom function that allows you to enlarge the whole browser window. You can access it by clicking the control and plus buttons (Ctrl +) together. If you are using Firefox version 1.5 or later, you can use the same method, or open the "View" menu to increase the text size. If you are using Google Chrome, you can zoom in through the options menu. The Web Accessibility Initiative's website provides more detailed information on changing text size and colour.