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.
Open Personalization by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Personalization.
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.
In the DPI Scaling dialog box, do one of the following:
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.
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.
In the DPI Scaling dialog box, click Custom DPI.
In the Scale to this percentage of normal size list, enter the percentage you want, and then click OK.
If you set the DPI higher than 96, and you are running Windows Aero (the premium visual experience of Windows Vista), the text and other items on the screen might appear blurry in some programs that are not designed for high–DPI display in this version of Windows. You can avoid this issue by using Windows XP–style DPI scaling for these programs.
Select the Use Windows XP style DPI scaling check box, and then click OK.