The fastest way depends on what you're looking at

Font size changes differently depending on whether you're working in a document, a web browser, or your computer's system settings. In most programs, you can hold Ctrl (Windows) or Command (Mac) and scroll your mouse wheel up to make text larger, or scroll down to make it smaller. This works in web browsers, Word documents, email, and many other applications. If you're using a trackpad instead of a mouse, hold Ctrl or Command and swipe two fingers up or down.

If you want to change the size permanently in a document you're editing, you can select the text first, then use the font size dropdown menu in the toolbar — usually a box showing a number like "12" or "14". Click it and choose a larger or smaller size from the list.

For system-wide changes that affect everything on your screen, you'll go into your computer's settings rather than individual programs. This is the right choice if reading small text causes you strain or if you want all your menus and icons larger.

Key Takeaways

  • Hold Ctrl (Windows) or Command (Mac) and scroll your mouse wheel or trackpad to resize text in most programs when ready.
  • In documents and emails, select text first, then use the font size dropdown in the toolbar to change it permanently.
  • Windows and Mac both have system settings that enlarge text across your entire computer, not just one program.
  • Zoom and font size are different — zoom makes everything larger including images and buttons, while font size changes only the text.

Changing font size in Windows

On Windows 10 and Windows 11, the easiest route is the Settings app. Click the Windows button in the bottom left corner, type "display settings" into the search box, and press Enter. Look for the section labeled "Scale and layout" or "Text size". You'll see a slider that says "Change the size of text, apps, and other items" — drag it to the right to make everything larger, or to the left to make it smaller. Windows will ask you to sign out and back in for the change to take full effect.

If you only want to enlarge text and not buttons and icons, scroll down in that same Settings window and look for "Advanced display settings". At the bottom, you'll find "Text size" with its own separate slider. This affects only the words in menus and dialog boxes, not the overall zoom level.

For a single program like Microsoft Word or your web browser, the Ctrl+scroll method works when ready and doesn't require restarting. The change stays in place the next time you open that program.

Changing font size on Mac

On macOS, click the Apple menu in the top left corner and select "System Settings" (or "System Preferences" on older versions). Click "Displays" in the sidebar. At the bottom of the window, you'll see "Text size" with a slider — drag it to the right to enlarge text throughout your system. This affects menus, dialog boxes, and most applications.

If you want to make everything on your screen larger, not just text, look for the "Resolution" section instead. Choose "Scaled" and then pick a lower resolution number — lower numbers make everything bigger. This is different from text size and affects icons and buttons as well.

In individual Mac applications like Mail or Safari, hold Command and press the plus key (+) to enlarge, or the minus key (−) to shrink. This change persists when you close and reopen the app.

Changing font size in web browsers

Every major browser — Chrome, Firefox, Safari, and Edge — uses the same shortcut: hold Ctrl (Windows) or Command (Mac) and scroll your mouse wheel up to zoom in, or scroll down to zoom out. You can also hold Ctrl or Command and press the plus key (+) or minus key (−). The change applies only to that website and stays in place when you visit again.

If you want to change the default text size for all websites, go into your browser's settings. In Chrome, click the three-dot menu in the top right, select "Settings", then "Appearance". Look for "Font size" and choose Small, Medium, Large, or Very Large. In Firefox, click the menu button, go to "Settings", then "Fonts & Colors", and adjust the size there. Safari users can go to "Safari" menu, then "Settings", then "Appearance".

Be aware that some websites override your font size choice and force their own size. The zoom shortcut (Ctrl/Command + scroll) will still work on those sites and overrides the website's setting.

Changing font size in Microsoft Word and Google Docs

In Microsoft Word, select the text you want to resize by clicking and dragging across it. In the toolbar at the top, find the font size box — it usually shows a number like "11" or "12". Click the dropdown arrow next to it and choose a size from the list, or type a custom number directly into the box. Sizes range from 8 to 72 points, and you can go higher by typing a larger number.

In Google Docs, the process is identical. Select your text, then click the font size dropdown in the toolbar (it shows a number by default). Choose from the preset sizes or type a custom number. Your changes save automatically to Google Drive.

If you want to change the default font size for all new documents you create, set it before you start typing. In Word, select the size you want, then go to the Home tab, click the small arrow in the bottom right corner of the Styles group, and select "Save as Default". In Google Docs, change the size, then click "Format" in the menu, hover over "Paragraph styles", and click "Update Normal to match".

Changing font size in email programs

In Gmail, click the Settings gear icon in the top right, then "See all settings". Go to the "Display density" section and choose Compact, Default, or Comfortable. Comfortable spreads out your email list and makes text easier to read. For the email body itself, open an email and use Ctrl+scroll (Windows) or Command+scroll (Mac) to zoom in and out.

In Outlook on Windows, go to "File", then "Options", then "Accessibility". Look for "Zoom" and set it to a percentage higher than 100% to enlarge everything. In Outlook on Mac, click "Outlook" in the menu bar, select "Preferences", then "View", and adjust the zoom level there.

In Apple Mail, click "Mail" in the menu bar, select "Preferences", then "Viewing". You'll see a "Font size" dropdown — choose a larger size. This affects how your email list and message bodies appear.

When to use zoom versus font size

Zoom makes everything larger — text, images, buttons, and spacing. It's useful when you want the whole page or document to be bigger. Font size changes only the text, leaving images and buttons at their original size. Use font size when you want to read words more easily but don't need everything enlarged.

In web browsers, the Ctrl+scroll shortcut is actually zoom, not font size. It enlarges the entire page. If a website has very small text and you want only that text bigger without changing image sizes, you may need to use your browser's font size settings instead (found in the browser's main settings menu, not the zoom shortcut).

System-wide text size changes in Windows and Mac affect menus and dialog boxes but not every process — some programs ignore the setting. If a program doesn't respond to system settings, use the Ctrl+scroll zoom method in that program instead.

Frequently Asked Questions

Why does my font size change back after I close the program?

If you used Ctrl+scroll to zoom, the change should stay. If it reverted, you may have accidentally changed only that one document's zoom level rather than the program's default. In Word or Google Docs, make sure you save the document after resizing. If you changed system settings and they reverted, your computer may have restarted or another user account may have different settings.

Can I make font size bigger on my phone the same way as my computer?

No — phones use different settings. On iPhone, go to Settings, then Accessibility, then Display & Text Size, and adjust "Larger Accessibility Sizes". On Android, go to Settings, then Accessibility, then Text and Display, and use the font size slider. The methods are different because phones have smaller screens.

What if a website won't let me zoom in?

Some websites block zoom to protect their layout. Try using your browser's font size setting instead of the zoom shortcut — this changes only text size and may work when zoom is blocked. If that doesn't work, you can also use your operating system's text size setting to enlarge everything on your screen, which overrides website restrictions.

Is there a difference between points and pixels for font size?

Yes — points are used in print and documents (72 points equals one inch), while pixels are used on screens. When you change font size in Word or Google Docs, you're using points. When you zoom in a web browser, you're usually changing pixels. For most everyday use, you don't need to know the difference — just pick a size that's comfortable to read.

How do I make the font bigger in a PDF?

Use Ctrl+scroll (Windows) or Command+scroll (Mac) to zoom in on any PDF, whether you're viewing it in your browser or in a PDF reader like Adobe Acrobat. The zoom level stays in place when you close and reopen the file. Some PDF readers also have a font size option in their settings menu, but zoom is the fastest method.