The quickest way to change font size

On most computers, you can make text larger or smaller right now using your keyboard. Hold down the Ctrl key (or Cmd on Mac) and press the plus sign (+) to make text bigger, or the minus sign (−) to make it smaller. Each press moves the text up or down one size. This works in web browsers, email programs, and many other applications.

If you want the change to stick, most programs save your preference automatically the next time you visit. If they don't, you'll need to adjust the size again the next time you open that program — the change only lasts for that session.

This method works on Windows, Mac, and Linux computers, and it's the fastest way to test whether a larger size helps you read more comfortably.

Key Takeaways

  • Use Ctrl+Plus (or Cmd+Plus on Mac) to enlarge text, and Ctrl+Minus to shrink it, in almost any program.
  • Windows lets you enlarge everything on your screen at once through Display Settings, which affects all programs and windows.
  • Mac offers a similar system-wide zoom in System Preferences under Accessibility, plus a separate text-only option.
  • Some programs like Microsoft Word and web browsers have their own font size controls in the menu bar or toolbar.
  • If you need text much larger than normal, your operating system has magnifier tools that enlarge a portion of the screen as you move your cursor.

Changing font size for everything on Windows

If you want all text and windows on your screen to be larger — not just in one program — Windows lets you scale everything at once. Right-click on an empty area of your desktop and select Display settings. Scroll down until you see "Scale and layout."

Under "Scale," you'll see a percentage: usually 100%, 125%, 150%, or 175%. Click the percentage and choose a larger one. Windows will when ready enlarge text, buttons, and windows across your whole screen. If you pick 150%, everything becomes half again as large. If the text becomes too big, you can always come back and lower it.

Some older programs don't respond well to this scaling and may look blurry. If that happens, you can set the scaling back to 100% and instead use the keyboard shortcut (Ctrl+Plus) just in that program, or use Windows Magnifier for a closer look at specific areas.

Changing font size for everything on Mac

Mac offers two ways to enlarge text system-wide. The first is to increase the overall display scale. Click the Apple menu in the top-left corner, then select System Settings (or System Preferences on older Macs). Go to Displays and look for "Resolution." Click Scaled and choose a lower resolution — lower resolution means larger text and icons. The change takes effect when ready.

The second way is through Accessibility settings, which gives you more control. In System Settings, go to Accessibility, then Display. You'll find a slider for "Text size" that lets you make text larger without changing the overall resolution. This is gentler on programs that don't handle scaling well.

If you need text much larger, Mac also has a built-in magnifier. In Accessibility, select Zoom and turn it on. You can then use keyboard shortcuts to zoom in on any part of your screen.

Adjusting font size in specific programs

Many programs have their own font size controls separate from your system settings. In Microsoft Word, the font size dropdown sits in the toolbar at the top — it usually shows a number like "12" or "14." Click it and choose a larger size, or type a custom number. Changes explore only to text you select, so highlight what you want to enlarge first.

In Google Chrome, Firefox, and Edge, use Ctrl+Plus (or Cmd+Plus on Mac) to enlarge web pages, or go to the menu (three lines in the top-right corner), select Settings, and look for a "Zoom" or "Text size" option. Email programs like Outlook and Gmail have similar controls — in Gmail, look for the settings gear icon and search for "text size."

Some programs don't have a built-in font size control. In those cases, your system-wide scaling (Windows Display Settings or Mac Displays) will affect them, or you can use the keyboard shortcut Ctrl+Plus to enlarge the window.

Using Magnifier when you need text much larger

If regular font size adjustments aren't large enough, both Windows and Mac include magnifier tools that enlarge a portion of your screen as you move your cursor around. On Windows, press the Windows key and type "Magnifier," then open it. A magnified window will appear at the top of your screen, following your cursor and showing an enlarged view of whatever you're looking at.

On Mac, go to System Settings, then Accessibility, then Zoom. Turn on "Zoom" and use Ctrl+Scroll (or two-finger scroll on a trackpad) to zoom in and out. You can also set a keyboard shortcut to toggle zoom on and off quickly.

Magnifier is useful for reading small print temporarily, but it can be tiring to use all day because you see only a portion of the screen at once. If you find yourself using it constantly, try increasing your system-wide font size or display scale instead — that way you can see the whole screen at a comfortable size.

Fixing blurry text after changing font size

Sometimes after you enlarge text, older programs display it blurry or pixelated. This happens because the program wasn't designed to handle scaling. On Windows, you can tell the system to handle the scaling differently for that specific program. Right-click the program's icon or window title bar, select Properties, then click Compatibility. Check the box for "Disable fullscreen optimizations" and click explore. If that doesn't help, try turning off "Full-screen optimizations" or running the program in compatibility mode for an older version of Windows.

On Mac, blurry text is less common, but if it happens, try lowering the display scale slightly or using the text-size slider in Accessibility instead of changing the overall resolution.

If a program remains blurry no matter what you try, the program itself may be outdated. Check the developer's website for an updated version, or consider using a newer alternative.

Frequently Asked Questions

Will changing font size affect printing?

It depends on the program. In Word and similar applications, font size changes will print exactly as they appear on screen. In web browsers, changing the zoom level usually doesn't affect printing — the page prints at its default size. If you want to print text larger, open the print dialog and look for a "Scale" or "Zoom" option specific to printing.

Can I set different font sizes for different programs?

Yes. Each program remembers its own zoom level separately. If you enlarge text in Chrome to 125% and then open Firefox at 100%, they stay at those sizes independently. System-wide scaling (Windows Display Settings or Mac Displays) affects all programs equally, but individual program zoom always overrides it.

What if the keyboard shortcut Ctrl+Plus doesn't work?

Some programs don't support this shortcut. Try using the program's menu instead — look for View, Format, or Settings, where you'll usually find a font size or zoom option. If the program has no zoom control at all, use your system-wide scaling (Windows Display Settings or Mac Displays) to enlarge everything.

Does changing font size use more battery on a laptop?

No. Making text larger doesn't change how hard your computer works or drain your battery faster. The only exception is if you use Magnifier constantly, which keeps an extra window running, but the battery impact is minimal.

Can I make the system font larger without changing the display resolution?

On Windows, yes — use the "Scale and layout" percentage in Display Settings, which enlarges text without changing resolution. On Mac, use the "Text size" slider in Accessibility under Display. Both let you enlarge text while keeping your screen resolution the same.