The fastest way to enlarge text on your iPhone
You can make text larger on your iPhone in three ways: adjust the system-wide font size in Settings, turn on Larger Accessibility Sizes for even bigger text, or use the zoom feature to magnify everything on screen. The method you choose depends on whether you want text bigger everywhere or just in certain apps.
The quickest route for most people is the Display & Text Size setting, which takes about 30 seconds and affects Mail, Messages, Notes, and many other built-in apps. If you need text much larger than that setting allows, Larger Accessibility Sizes can go significantly bigger. If you want to enlarge text in a single app that does not respond to these settings, the Zoom feature magnifies the entire screen.
Key Takeaways
- Go to Settings > Display & Text Size and drag the slider to the right to make text larger in most Apple apps without restarting your phone.
- Turn on Larger Accessibility Sizes in Settings > Accessibility > Display & Text Size if the standard slider does not make text large enough.
- Use the Zoom feature (Settings > Accessibility > Zoom) to magnify everything on screen, including apps that do not respond to text size changes.
- Triple-tap the screen with one finger to turn Zoom on and off once you have set it up, without returning to Settings.
Changing text size in Display & Text Size settings
Open Settings on your home screen, then tap Display & Text Size. You will see a slider at the bottom with a small letter A on the left and a large letter A on the right. Drag the slider to the right to make text bigger. The preview text above the slider shows you how large the text will become as you move it.
This setting affects text in Mail, Messages, Notes, Calendar, Reminders, and Stocks. It does not change text in Safari, Maps, or third-party apps like Facebook or Instagram — those apps have their own text size controls. The change takes effect when ready; you do not need to restart your phone or close and reopen apps.
Using Larger Accessibility Sizes for maximum text enlargement
If the Display & Text Size slider does not make text large enough, turn on Larger Accessibility Sizes. Go to Settings > Accessibility > Display & Text Size, then toggle on Larger Accessibility Sizes. This unlocks a much wider range of sizes, from extra small all the way to 188 points.
Once you turn on Larger Accessibility Sizes, the slider in Display & Text Size expands to show the full range. Drag it to whatever size you need. Text in supported apps will jump to that size when ready. Be aware that very large text sizes may cause some app layouts to break — buttons and text may overlap or run off the edge of the screen in apps not designed for extreme enlargement.
Zooming the entire screen when apps do not respond to text size changes
Some apps, especially older ones or third-party apps, ignore the system text size settings. For those, use the Zoom feature to magnify everything on screen. Go to Settings > Accessibility > Zoom and toggle it on.
Once Zoom is on, triple-tap the screen with one finger to zoom in. Triple-tap again to zoom out. You can also triple-tap and hold, then drag your finger up to zoom in further or down to zoom out. The zoom level stays where you set it until you change it again. Zoom magnifies the entire display, including the keyboard, buttons, and images, so it works in any app.
Adjusting text size in individual apps
Some apps have their own text size controls separate from the iPhone system settings. Safari, for example, has a text size button in the menu. Open Safari, tap the menu icon (three horizontal lines), then tap the letter A with a plus or minus sign next to it to enlarge or shrink text on web pages.
Mail also has its own text size control. Open an email, tap the sender's name at the top, then tap the arrow next to their name to reveal options including text size. Check the app's menu or settings if the system-wide text size change does not affect it.
Combining text size changes with other accessibility features
You can use text size changes together with other accessibility features to make reading even easier. Bold Text (Settings > Accessibility > Display & Text Size > Bold Text) makes text thicker and darker, which some people find easier to read alongside larger sizes.
Increase Contrast (Settings > Accessibility > Display & Text Size > Increase Contrast) adds darker backgrounds behind text, reducing glare. Reduce Transparency (Settings > Accessibility > Display & Text Size > Reduce Transparency) removes blurred backgrounds, making text stand out more sharply. These features work with any text size setting and do not slow down your phone.
Reverting to default text size
To return text to its original size, go back to Settings > Display & Text Size and drag the slider all the way to the left. If you turned on Larger Accessibility Sizes, toggle it off first, then adjust the slider. The text will return to the default size when ready.
If you used Zoom, triple-tap the screen to turn it off, or go to Settings > Accessibility > Zoom and toggle it off. Your phone will remember your previous zoom level if you turn Zoom back on later, so you do not have to reset it from scratch.
Frequently Asked Questions
Will changing font size slow down my iPhone?
No. Text size changes are purely visual and do not affect your phone's performance, battery life, or speed. You can use the largest text sizes available without any impact on how your iPhone runs.
Why does text in some apps not get bigger when I change the system text size?
Third-party apps and some built-in apps like Safari do not respond to the system text size setting. Those apps either have their own text size controls in their menus, or they only respond to the Zoom feature. Check the app's settings or menu for a text size option.
Can I set different text sizes for different apps?
No. The system text size setting applies to all compatible apps at once. If you need different sizes in different apps, use Zoom for apps that do not respond to the system setting, and adjust the system setting for the rest.
Does Zoom work in all apps?
Yes. Zoom magnifies the entire screen, so it works in every app, including Safari, Maps, and third-party apps. The downside is that Zoom magnifies everything — buttons, text, images, and the keyboard — so you may need to scroll more to see the full screen.
What is the difference between Display & Text Size and Larger Accessibility Sizes?
Display & Text Size offers a standard range of sizes suitable for most people. Larger Accessibility Sizes unlocks a much wider range, including sizes up to 188 points, for people who need significantly larger text. Turn on Larger Accessibility Sizes only if the standard slider does not go large enough.