The quickest way to enlarge text on your screen

You can change font size in three places: your operating system settings (which affects most of what you see), individual programs (which overrides the system setting for that program alone), and your web browser (which only affects websites). The fastest route depends on what you're trying to read. If everything on your screen is too small, change your system zoom. If only your email or documents are hard to read, change the font size in that specific program instead.

Each method works independently, so you can use them together. You might set your system zoom to 125% for everything, then enlarge Word documents to 14-point font, and zoom your browser to 150% on one particular website. The changes don't interfere with each other.

Key Takeaways

  • Windows and Mac both have a system-wide zoom setting that enlarges everything at once, found in Display or Accessibility settings.
  • Most programs like Word, Outlook, and email clients have their own font size controls in the Format menu or toolbar.
  • Web browsers let you zoom just websites without affecting anything else on your computer.
  • Keyboard shortcuts work in most programs: Ctrl and + (Windows) or Command and + (Mac) to enlarge, and the minus key to shrink.
  • Some programs reset their font size to default when you restart, so check whether your change sticks before relying on it.

Changing font size system-wide on Windows

On Windows 10 and 11, go to Settings > System > Display. Under "Scale and layout," you'll see a dropdown that says "Change the size of text, apps, and other items." The default is 100%. Click the dropdown and choose 125%, 150%, or 175%. This enlarges text, buttons, and icons across most of your screen.

If you want finer control, scroll down on the same page to "Advanced scaling." You can type in any percentage between 100% and 500%. After you change it, Windows will ask you to sign out and back in for the change to take full effect. Some older programs may not respond to this setting, but most modern software will. The change applies to everything—your desktop, menus, and all programs that respect Windows scaling.

Changing font size system-wide on Mac

On Mac, go to System Settings > Accessibility > Display. You'll see a slider labeled "Text size." Drag it to the right to enlarge text in menus, dialog boxes, and most programs. This is the closest Mac equivalent to Windows' system zoom, though it affects fewer places than Windows does. The change takes effect when ready without requiring a restart.

If you need everything larger, including the dock and menu bar, try System Settings > Accessibility > Zoom instead. Turn on "Use keyboard shortcuts to zoom" and then press Option + Command + 8 to turn zoom on. Use Option + Command + = (equals) to zoom in and Option + Command + - (minus) to zoom out. This magnifies your entire screen like a magnifying glass, which is more powerful than the text size slider but also more disorienting for everyday use.

Changing font size in Word, Outlook, and email programs

In Microsoft Word, select the text you want to enlarge (or press Ctrl+A to select all). Look at the toolbar at the top—you'll see a box with a number in it, usually showing "11" or "12". Click that box and choose a larger size, or type a number directly. Common sizes are 12, 14, 16, and 18 points. If you want all new documents to use a larger font, change the font size, then go to Home > Styles > right-click "Normal" > Modify > set your preferred size > OK. This makes the change permanent for every new document you create.

In Outlook, go to File > Options > Mail > Stationery and Fonts. Click Fonts and choose your preferred size for composing new messages. For reading incoming mail, go to File > Options > Accessibility and adjust the zoom level there. In Gmail and other web-based email, use your browser's zoom (Ctrl++ on Windows, Command++ on Mac) instead, since these programs don't have their own font size controls.

Enlarging text in your web browser

Every major browser—Chrome, Edge, Firefox, and Safari—has a built-in zoom feature that only affects websites. Press Ctrl++ (Windows) or Command++ (Mac) to enlarge. Press Ctrl+- or Command+- to shrink. Press Ctrl+0 or Command+0 to reset to 100%. The zoom level you set stays in place for that website the next time you visit it, so you don't have to re-zoom every time.

If you want to change the default font size for all websites at once, go to your browser settings. In Chrome, go to Settings > Appearance > Font size and choose your preference. In Firefox, go to Settings > Fonts and Colors > Fonts and adjust the size. In Edge, go to Settings > Appearance > Fonts. In Safari, go to Settings > Websites > Reader and adjust there. This default applies to every new website you visit unless you override it with the zoom shortcut.

Using keyboard shortcuts to change font size quickly

Most programs respond to the same keyboard shortcuts. Hold Ctrl (Windows) or Command (Mac) and press the + key (plus) to enlarge. Press the - key (minus) to shrink. Press 0 (zero) to reset to the default size. This works in Word, Outlook, most email programs, PDF readers, and web browsers. The shortcuts are faster than hunting through menus, especially if you need to adjust size frequently.

The disadvantage is that some programs don't support them, and the change may not stick if you close and reopen the program. Test it once to see whether your program remembers the size you set. If it doesn't, you'll need to use the program's preferences menu instead to make a permanent change.

What to do if font size changes don't stick

Some programs reset their font size to the default every time you restart them. If this happens, you may need to change the setting in a preferences or options menu instead of just using the toolbar. In Word, for example, changing the default font (as described above) will persist, but changing the size of text in a single document will not carry over to new documents. The difference is whether you're changing a preference or just editing one file.

If a program consistently ignores your font size changes, check whether it has a "Remember my preferences" or "Save settings on exit" option in its settings menu. If it does, turn that on. If the program still won't cooperate, you may need to use your system-wide zoom instead, or consider whether a different program with better accessibility options would work better for you. Some older or less-maintained programs straightforward don't save these settings reliably.

Frequently Asked Questions

Can I make fonts bigger just for one website without affecting others?

Yes. Use your browser's zoom feature (Ctrl++ or Command++) on that specific website. The browser remembers the zoom level for each site separately, so you can have one website at 150% and another at 100% without changing anything else.

Why does my font size reset when I close the program?

Some programs don't save font size changes to their default settings. You changed the size in that one document or session, but the program didn't save it as a preference. To make it permanent, look for a "Default Font" or "Preferences" option in the program's menu and change it there instead.

Will changing my system zoom affect games or video calls?

It may. Some games and video applications don't respond well to system-wide zoom and may look blurry or stretched. If that happens, turn off system zoom and use the zoom feature within the specific program instead, or use your browser's zoom if it's a web-based process.

What's the difference between zoom and font size?

Font size is the height of the letters themselves, measured in points. Zoom enlarges everything proportionally—text, images, buttons, and spacing. Zoom is faster for making everything bigger at once; font size is more precise when you want to change only the text.

Can I make the Windows login screen text bigger?

Not directly from the login screen itself. You can only adjust login screen text size after you've signed in, through Display settings. If you have difficulty reading the login screen, try using Ease of Access before you sign in—press the Windows key + U on the login screen to open accessibility options.