Where to find the text size controls on your iPhone

The quickest way to make text larger or smaller on your iPhone is through Settings > Accessibility > Display & Text Size. Open Settings, tap Accessibility, then look for Display & Text Size near the top of the menu. You'll see a slider labeled "Larger Accessibility Sizes" or straightforward a text size control with a small "A" on the left and a large "A" on the right. Drag the slider to the size you want, and the change takes effect when ready in most apps.

Not all text on your iPhone responds to this setting — some apps have their own size controls, and system text like the time and battery indicator stay fixed. But email, Messages, Notes, Mail, Safari, and most built-in apps will resize right away.

Key Takeaways

  • The main text size control is in Settings > Accessibility > Display & Text Size, where you drag a slider to make text larger or smaller across most apps.
  • If you need text even larger than the standard maximum, turn on "Larger Accessibility Sizes" in the same menu to unlock extra-large options.
  • Some apps like Kindle, News, and social media have their own text size buttons inside the app itself, separate from the system setting.
  • Safari, Mail, and Messages respect the system text size setting, so changing it once affects reading across multiple apps.
  • The system-level change does not affect the size of app icons, buttons, or the home screen layout — only the text inside content.

Using the standard text size slider

Open Settings and go to Accessibility > Display & Text Size. You'll see a slider with an "A" icon on each end. The left "A" is smaller, the right "A" is larger. Tap and drag the slider to the right to increase text size, or to the left to decrease it. The preview text above the slider shows you how your choice will look before you confirm it.

This slider controls the default text size in Mail, Messages, Notes, Safari, Reminders, Calendar, and most other Apple apps. The change is when ready — you don't need to restart anything. If you find the maximum size on this slider still isn't large enough, scroll down and turn on "Larger Accessibility Sizes" to unlock even bigger options.

Enabling extra-large text with Larger Accessibility Sizes

If the standard slider doesn't go large enough, Larger Accessibility Sizes adds five additional size steps beyond the normal maximum. This setting is in the same menu: Settings > Accessibility > Display & Text Size. Scroll down past the main slider and toggle on "Larger Accessibility Sizes." Once you turn it on, the slider above it will expand to include those larger steps.

Be aware that turning on Larger Accessibility Sizes can affect the layout of some apps — text may wrap differently, buttons may move, or some content might require more scrolling. This is intentional: the setting prioritizes readability over compact design. If an app doesn't handle large text well, you can usually adjust the size within that app's own settings instead.

Changing text size in individual apps

Many apps have their own text size controls that override or supplement the system setting. In Safari, open a webpage and tap the "aA" button in the address bar, then choose a text size. In Apple Books, open a book and tap the text icon (usually marked "aA" or similar) to adjust font size and style. In News, tap the text icon at the bottom of an article.

Third-party apps like Kindle, Medium, and social media platforms often have their own size buttons too — usually found in a menu or settings icon within the app. These app-level controls let you fine-tune the reading experience without changing your system-wide setting. If you change the system text size and an app still looks wrong, check inside that app's menu for its own adjustment.

What text size changes affect and what it doesn't

The system text size setting in Accessibility affects the size of text in content — emails, messages, articles, notes — but not the size of app names on your home screen, app icons, buttons, or interface labels. The time in the status bar, battery percentage, and notification badges stay the same size regardless of your text size choice.

If you want to make icons and interface elements larger as well, that's a separate setting: Settings > Accessibility > Display & Text Size > Larger Accessibility Sizes (which also enlarges some UI elements) or Settings > Display & Brightness > Text Size (which is different from the Accessibility version). The Accessibility version gives you more control and larger maximum sizes.

Resetting text size to default

To return text to the standard size, go back to Settings > Accessibility > Display & Text Size and drag the slider to the middle position. If you turned on Larger Accessibility Sizes, toggle it off. The change takes effect when ready in all apps that use the system setting.

If you changed text size in individual apps, you'll need to reset each one separately using that app's own menu. There's no master reset for app-specific settings — you have to go back into each app and adjust it manually.

Frequently Asked Questions

Why is text still small after I changed the size setting?

Some apps ignore the system text size and use their own controls instead. Check inside the app for a text size button — usually marked "aA", a text icon, or found in Settings within the app. If the app has no size control, contact the app's developer; they may not support text resizing.

Can I change text size on the home screen and lock screen?

No. The system text size setting only affects text inside apps and content, not app names, icons, or lock screen elements. If you want larger interface elements overall, turn on "Larger Accessibility Sizes," which enlarges some UI components in addition to text.

Does changing text size affect battery life?

No. Text size has no meaningful impact on battery consumption. Your iPhone's power use depends on screen brightness, app activity, and network use, not on the size of the text being displayed.

Will changing text size affect my iCloud backup or sync?

No. Text size is a local device setting stored on your iPhone only. It won't sync to other devices, and changing it won't affect your backups or any data in iCloud.

What if text looks blurry after I increase the size?

Blurriness usually means the app or website wasn't designed to handle large text well. Try adjusting the size slightly smaller, or check if the app has its own text rendering options (like font choice or line spacing) that might help. If a website looks blurry in Safari, try using Safari's reader view, which often handles large text better.