DPI settings in Windows Vista

You can make the text and other items, such as icons, on your screen easier to see by making them larger. You do this by increasing the dots per inch (DPI) scale. You can also decrease the DPI scale to make text and other items on your screen smaller, so that more information fits on the screen.

To decrease the text size and other items on your screen smaller please follow the steps given below:

1. Open Personalization by clicking the Start button ( or press CTRL+ESC or Windows Logo key to open the start button menu), 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 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.

For more information please visit the web link below:
http://windowshelp.microsoft.com/Windows/en-US/help/454f5078-2b51-4cda-b4c0-6391e870c41d1033.mspx