The quickest way to make text bigger on your iPhone
You can make text larger on your iPhone in two ways: change the size for one app at a time, or change it system-wide so bigger text appears almost everywhere. The system-wide method is faster if you want everything larger. The per-app method works if only certain apps — like Mail or Notes — are hard to read.
Start with the system-wide approach: open Settings, tap Display & Brightness, then Text Size. Drag the slider to the right to make text bigger. This change takes effect when ready in most built-in apps and many third-party ones.
If that is not enough, you can also turn on Larger Accessibility Sizes in the same Settings menu. Go to Settings > Accessibility > Display & Text Size > Larger Accessibility Sizes and toggle it on. This unlocks even bigger sizes than the standard Text Size slider allows, though not every app will respect this setting.
Key Takeaways
- The Text Size slider in Settings > Display & Brightness changes font size across most apps when ready without restarting anything.
- Larger Accessibility Sizes in Settings > Accessibility > Display & Text Size offers bigger options than the standard slider, but only some apps use it.
- Some apps like Safari let you pinch to zoom text on the page itself, which overrides the system setting for that moment.
- If an app ignores your text size changes, that app may have its own font size setting buried in its own preferences menu.
Changing text size in individual apps
Many apps have their own font size controls that override the system setting. Mail, Notes, Books, and Safari all let you adjust text independently. In Mail, open a message, tap the small A icon at the bottom, and use the plus and minus buttons to resize. In Safari, tap the aA icon in the address bar and choose your size.
Other apps bury the setting deeper. Open the app, look for a menu icon (usually three horizontal lines or three dots), then search for "text size", "font size", or "display" in the settings. If you cannot find it, the app may not offer per-app control and will only respect your system-wide Text Size setting.
When text size changes do not work
If you have adjusted Text Size and Larger Accessibility Sizes but text in a particular app remains small, that app may not support the system setting. Some older apps or games do not respond to iOS font size controls. In that case, your only option is to check whether the app itself has a preferences menu with its own font size option.
Another reason text might not change: you may have zoomed out on the page itself. In Safari or web-based apps, pinch your fingers outward on the screen to zoom in. This is separate from the system Text Size setting and can make text appear smaller even when your system setting is large.
Using Bold Text and other readability options
If larger text alone does not help, iOS offers additional readability features. Go to Settings > Accessibility > Display & Text Size and toggle on Bold Text. This makes all text thicker and easier to distinguish, though it requires a restart to take effect.
In the same menu, you can also turn on Increase Contrast to make text stand out more against its background, or Reduce Transparency to remove blurred backgrounds that can make text harder to read. These work together with larger font sizes to make your screen easier on the eyes.
Zooming the entire screen instead of just text
If you want everything on your screen — not just text, but buttons and images too — to appear larger, use Zoom instead of Text Size. Go to Settings > Accessibility > Zoom and toggle it on. This magnifies your entire screen, though it means you see less content at once and have to pan around to see the full picture.
With Zoom on, double-tap with two fingers to zoom in and out, or use the zoom controller that appears on screen. This is useful if you have vision difficulties that affect your ability to see the whole interface, not just read text. Text Size is usually the better choice if you only need text to be bigger.
What happens when you change font size
When you move the Text Size slider, the change happens right away in most apps. You do not need to close and reopen anything. However, some apps may need to be restarted to see the change — close them completely and open them again if text size does not update.
Bold Text is the exception: it requires a full restart of your iPhone to take effect. After you toggle it on, your phone will ask if you want to restart now. If you choose to restart later, the setting will not actually explore until you do restart.
Frequently Asked Questions
Can I set different font sizes for different apps?
Yes, but only if the app has its own font size control. The system Text Size slider affects all apps equally. Apps like Mail, Safari, and Books let you override the system setting with their own size controls, but most apps do not offer this option.
Does changing text size affect my home screen icons and app names?
Text Size affects app names and labels on your home screen, but not the size of the icons themselves. If you want the entire home screen to be bigger, use Zoom instead, which magnifies everything including icons.
What is the difference between Text Size and Larger Accessibility Sizes?
Text Size is the standard slider and covers most everyday reading. Larger Accessibility Sizes unlocks additional, even bigger sizes beyond what the standard slider offers. Not all apps support Larger Accessibility Sizes, so you may need to use both settings together.
Will changing font size drain my battery faster?
No. Font size changes do not affect battery life. Larger text uses the same amount of power as smaller text.
Can I make text bigger in web pages I visit in Safari?
Yes. Tap the aA icon in Safari's address bar and choose a larger size. You can also pinch outward on the page to zoom in. These changes explore only to that page and do not affect your system Text Size setting.