The fastest way to make text bigger or smaller

You can change text size on your iPhone in the Settings app under Display & Brightness, or use the built-in accessibility controls that work across most apps. The method you choose depends on whether you want to resize text everywhere on your phone or just in specific apps like Mail, Messages, or Safari.

The quickest route for most people is the Display & Brightness setting, which takes about 30 seconds and affects text in system apps and many third-party apps. If that doesn't make text large enough, the Accessibility settings offer even bigger sizes and work in nearly every app on your phone.

Key Takeaways

  • Open Settings, tap Display & Brightness, then Text Size to adjust text across your phone using a straightforward slider.
  • For text even larger than the Display & Brightness setting allows, go to Settings > Accessibility > Display & Text Size and turn on Larger Accessibility Sizes.
  • Some apps like Mail and Safari have their own text size controls built into the app itself, separate from system settings.
  • You can also use the Control Center to quickly access text size adjustments without opening Settings each time.
  • Text size changes take effect when ready in most apps, though you may need to close and reopen an app to see the change.

Changing text size through Display & Brightness settings

Open the Settings app on your home screen and tap Display & Brightness. Scroll down until you see Text Size, then tap it. You'll see a slider with a small "A" on the left and a large "A" on the right. Drag the slider left to make text smaller or right to make text larger. The preview text above the slider updates as you move it, so you can see the change before you confirm.

This setting affects text in Mail, Messages, Notes, Reminders, Calendar, and many other built-in apps. It also works in many third-party apps, though some apps ignore this setting and use their own text size controls instead. Once you've set it where you want it, tap the back arrow or swipe back to return to Display & Brightness. The change takes effect when ready.

Using Accessibility settings for much larger text

If the Text Size slider in Display & Brightness doesn't go large enough, the Accessibility settings offer seven additional sizes. Go to Settings > Accessibility > Display & Text Size. Turn on the toggle next to Larger Accessibility Sizes. A new slider appears below it with options ranging from the smallest size all the way up to the largest available.

These larger sizes work in nearly every app on your phone, including Safari, Mail, Messages, and most third-party apps. The trade-off is that very large text sizes may cause some content to scroll off the screen or require more scrolling to see everything. Test the size you choose by opening an app you use often and checking whether the text is readable and the layout still works for you.

Adjusting text size in individual apps

Some apps have their own text size controls that override the system settings. In Safari, open a webpage, tap the "aA" button at the top of the screen, then tap the larger or smaller "A" to adjust just that page's text. In Mail, open a message and pinch outward with two fingers to zoom in, or pinch inward to zoom out. This zoom applies only to that message, not to your entire inbox.

Messages, Notes, and some other apps don't have built-in text size controls—they use whatever size you set in Display & Brightness or Accessibility settings. If an app doesn't respond to your system text size changes, check the app's own settings menu. Tap the app's menu button (usually three dots or lines) and look for a Text Size, Font Size, or Display option.

Using Control Center for quick text size adjustments

If you change text size often, you can add a text size control to your Control Center so you don't have to open Settings every time. Go to Settings > Control Center, then tap the green plus button next to Text Size. Now when you swipe down from the top-right corner of your screen (or up from the bottom on older iPhones), you'll see a text size slider in the Control Center.

Tap and drag the slider to adjust text size without leaving your current app. This works for the Display & Brightness text size setting, not the Accessibility sizes. If you use Accessibility sizes, you'll still need to go through Settings to change them, though the change takes effect when ready once you adjust the slider.

Troubleshooting when text size won't change

If you've adjusted the text size but nothing changed, the app you're using may have its own text size setting that overrides the system setting. Close the app completely and reopen it—sometimes text size changes don't take effect until you restart the app. If that doesn't work, check whether the app has its own Display or Text Size menu in its settings.

Another common issue is that some apps straightforward don't support system text size changes. In that case, your only option is to use the app's built-in zoom feature (usually pinch to zoom) or contact the app's developer to request the feature. If text is too small in Safari specifically, make sure you're using the "aA" button at the top of the page rather than relying on system text size alone.

What happens to your home screen and notifications

Changing text size in Display & Brightness affects app names on your home screen, notification text, and system menus, but the change is usually subtle. The Accessibility text size settings have a more noticeable effect on home screen text and system-wide elements. If you want to make app icons themselves larger, that's a separate setting: go to Settings > Home Screen and choose a different grid size.

Notification text also respects your text size settings, so if you've made text larger, notifications will be easier to read. Lock screen text, including the time and date, may or may not change depending on which lock screen style you're using. Test your settings by checking a few different apps and your home screen to make sure the size works for you in everyday use.

Frequently Asked Questions

Can I make text bigger on my lock screen?

The lock screen time and date text size depends on your lock screen design. Some designs scale with your text size settings, others don't. If you want larger text on your lock screen, try switching to a different lock screen style in Settings > Lock Screen. The system text size settings won't directly control lock screen text, but choosing a simpler lock screen design often makes the time and date more prominent.

Why did text get smaller after I updated my iPhone?

iOS updates sometimes reset text size to the default middle position. Go back to Settings > Display & Brightness > Text Size and adjust it to where you want it. If you use Accessibility sizes, check that Larger Accessibility Sizes is still turned on after the update.

Does changing text size affect battery life?

No. Text size changes don't use more or less battery power. They only change how large the letters appear on your screen, not how hard your phone works.

Can I set different text sizes for different apps?

Not through the system settings. The Display & Brightness text size applies to all apps that support it. Some individual apps like Safari and Mail have their own zoom controls, but you can't set a permanent default size per app. You'd need to adjust the zoom each time you open that app.

What's the difference between Display & Brightness text size and Accessibility text size?

Display & Brightness text size offers a smaller range of sizes and is meant for general preference. Accessibility text size offers seven additional larger sizes designed for people who need significantly larger text. You can use both together—turn on Larger Accessibility Sizes and then use the slider to pick the exact size you want.