Open Personalization by clicking on the Start button, and after that click on the Control Panel, and search for Appearance and Personalization and select this option, and after that click on the Personalization.

In the left corner, click on to modify font size (DPI). If you are encouraged for an administrator password or verification, and type the password or present the verification.

In the DPI Scaling dialog box, click on the Custom DPI.

In the Scale to this percentage of standard size list, go in the fraction you desire, and at last click on the OK.

To notice the changes, shut all of your applications and then start again your Windows.

If you locate the DPI high than 96 and if you are using Windows Aero (the premium visual experience of Windows Vista), the text and other items on the monitor may appear foggy in a few applications that are not intended for high–DPI display in this edition of Windows. You can keep away from this problem by using Windows XP–style DPI scaling for these applications.

Open Personalization by clicking again on the Start button, and click on the Control Panel, a search for the Appearance and Personalization and click on it, and after that click on the Personalization tab.

In the left corner, click to modify the font size (DPI). If you are encouraged for an administrator password or verification, type the password or make available verification.

In the DPI Scaling dialog box, click on the Custom DPI. And choose the Use Windows XP style DPI scaling check box, and finally click on OK.