When a Word document has tiny text, a quick adjustment to the font size renders a document legible. Other programs, however, don't always have adjustable font sizes. As a solution, Windows 8 includes a Magnifier tool to zoom in on any section of your screen. Windows also offers text size settings for adjusting system font sizes. While on the Web, your Web browser has its own zoom options for enlarging website content.
Enlarge System Text
Right-click on the Windows desktop and select "Personalize."
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Click "Display" to open the Display Control Panel. As a shortcut to reach this point, press "Windows-W" and search for "Display" in the Modern UI.
Click "Magnifier" to open a magnification lens. As you move your mouse around the screen, the lens enlarges the region surrounding the cursor. To zoom in or out, click the plus and minus buttons in the Magnifier program or use the shortcuts "Windows-Plus" and "Windows-Minus." You can also launch Magnifier from within another program with the shortcut "Windows-Equals." Press "Windows-Esc" to quit Magnifier.
Change the size setting in the Display Control Panel to expand or shrink all parts of the Windows interface. To pick a specific size other than 100, 125 or 150 percent, click "Custom Sizing Options" and drag the ruler left or right. Applying a change to this setting logs you out of Windows temporarily, which closes all programs, so try to use the Magnifier instead whenever possible.
Pick a Windows component in the Change only the text size section and select a new size to resize an individual part of the system, such as window title bars. Changing these options does not log you out of Windows.
Resize Document or Web Text
Select a range of text in a Word document or other Office document and pick a new text size from the drop-down menu on the Home tab to enlarge text. By default, Word 2013 uses 11-point Calibri. To zoom in on a document without changing its font size, use the zoom slider in the lower right corner of the program.
Press "Ctrl-Plus" and "Ctrl-Minus" to zoom in and out of Web pages in Internet Explorer, Firefox or Chrome. Alternatively, open your browser's menu and click the plus and minus icons (in Chrome and Firefox) or select "Zoom" (in Internet Explorer).
Press "Alt-V" in Internet Explorer and select "Text Size" to pick a new text size without zooming other Web content, such as images.
In Firefox, press "Alt-V," choose "Zoom" and click "Zoom Text Only" to apply the zoom setting to text alone.
In Chrome, open the settings, search the settings for "font size" and pick a new size from the drop-down menu.
Zooming and adjusting text sizes on websites doesn't always work and might cause pages to display incorrectly. If your browser's zoom options don't work well, use the Windows Magnifier instead.
Magnifier works even in the Windows 8 Modern UI -- use the "Windows-Equals" shortcut to open it from inside an app.
Changing the Windows interface size setting from the default percentage resets any text size changes made in the "Change only the text size" section of the Display Control Panel.