With Windows Vista, you can make the text and other items larger or smaller for easier viewing, or so that they fit on your screen:
1. Open Personalization by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Personalization.
2. In the left pane, click Adjust font size (DPI). If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
3. In the DPI Scaling dialog box, do one of the following:
a. To increase the size of text and other items on the screen, click Larger scale (120 DPI)–make text more readable, and then click OK.
b. To decrease the size of text and other items on the screen, click Default scale (96 DPI)–fit more information, and then click OK.
To see the changes, close all of your programs, and then restart Windows.