Where to find font settings on your iPhone

Font changes on iPhone happen in Settings, not in individual apps. Open Settings, tap Display & Brightness, then scroll down to find Text Size and Bold Text. These two controls affect fonts across most of your phone — Mail, Messages, Notes, Calendar, and the home screen all respond to these settings.

If you want to change fonts in a specific app like Notes or Mail, that app may have its own font menu inside the app itself, separate from the system-wide settings. Not every app offers this choice, and the location varies by app.

For a more dramatic change — switching to a completely different typeface rather than just making text bigger or bolder — you need to look in Accessibility settings instead. This is where iPhone keeps its font family options.

Key Takeaways

  • Text Size and Bold Text in Display & Brightness settings change fonts across most built-in apps without touching individual app settings.
  • Accessibility settings hold the option to switch to a different typeface entirely, such as Dyslexia-friendly fonts or monospaced fonts.
  • Some third-party apps like Notes and Mail let you pick a font within the app itself, but this option is not available in every app.
  • Dynamic Type, found in Accessibility, lets you make text larger or smaller across your whole phone beyond what Display & Brightness offers.

Using Text Size to make fonts larger or smaller

Go to Settings > Display & Brightness > Text Size. You will see a slider with a small "A" on the left and a large "A" on the right. Drag the slider to the size you want. The preview text in the middle of the screen updates as you move it, so you can see the change before you confirm.

This setting affects text in Mail, Messages, Notes, Calendar, Reminders, and most other built-in apps. It does not affect text in Safari, Maps, or some third-party apps — those apps have their own size controls inside them.

If you need text even larger than the Text Size slider allows, turn on Larger Accessibility Sizes in Settings > Accessibility > Display & Text Size. This unlocks additional larger sizes beyond the standard range.

Turning on Bold Text for heavier font weight

Open Settings > Display & Brightness and toggle Bold Text on. Your iPhone will restart, and when it comes back, text throughout the system will appear thicker and darker.

Bold Text works alongside Text Size — you can make text both larger and bolder at the same time. The effect is most noticeable in Mail, Messages, and Settings itself. Some apps ignore this setting, so you may see bold applied in some places but not others.

If Bold Text makes your phone feel too heavy, toggle it back off in the same location. The change takes effect after your phone restarts again.

Changing the typeface itself in Accessibility settings

To switch from the standard San Francisco font to a different typeface, go to Settings > Accessibility > Display & Text Size. Scroll down to Font and tap it. You will see options including San Francisco (the default), New York, Menlo, Courier New, and others depending on your iOS version.

Each font has a different look and feel. San Francisco is clean and modern. New York is serif-based and more traditional. Menlo and Courier New are monospaced, meaning each letter takes up the same width — some people find these easier to read. Tap the font you want, and it applies system-wide.

Not every app respects the font choice you make here. Safari, Maps, and many third-party apps use their own fonts regardless of your Accessibility setting. But Mail, Messages, Notes, and Settings will all change to your chosen typeface.

Adjusting font size in individual apps

Some apps let you override the system font size with their own controls. In Mail, open an email, tap the three dots at the bottom right, and look for a text size option. In Notes, tap the three dots, then Text, then choose your size. In Safari, tap the "aA" button at the top right and use the slider to adjust text size for that webpage only.

These app-level controls do not change your system settings — they only affect that specific app or, in Safari's case, that specific page. If you close Safari and come back to the same page later, you may need to adjust the size again.

Third-party apps like Twitter, Reddit, or news readers may have font controls buried in their settings menu. Check the app's settings or preferences to see what options are available. Many apps do not offer font controls at all.

Using Dynamic Type for system-wide size control

Dynamic Type is an Accessibility feature that lets you set text size even larger than the standard Text Size slider allows. Go to Settings > Accessibility > Display & Text Size and toggle on Larger Accessibility Sizes. A new slider appears below it with sizes ranging from Extra Small to Extra Extra Extra Large.

When you turn on Larger Accessibility Sizes, the Text Size slider in Display & Brightness becomes less relevant — the Accessibility slider takes over. Apps that support Dynamic Type will respond to this setting. Mail, Messages, Notes, and Calendar all support it. Some third-party apps do not.

If you turn off Larger Accessibility Sizes, you go back to using the standard Text Size slider in Display & Brightness. Both methods work; Larger Accessibility Sizes just gives you a wider range.

Frequently Asked Questions

Does changing font size on iPhone affect text in all apps?

No. System-wide settings like Text Size affect Mail, Messages, Notes, Calendar, and Settings, but not Safari, Maps, or most third-party apps. Those apps either ignore the setting or have their own font controls inside them. Check each app's settings to see what options it offers.

Can I use different fonts in different apps?

Not really. The font choice you make in Accessibility > Display & Text Size applies to the whole system. Individual apps cannot override it, though some apps ignore it entirely and use their own typeface. You cannot set Mail to use one font and Notes to use another.

What is the difference between Text Size and Larger Accessibility Sizes?

Text Size is the standard slider in Display & Brightness and offers a moderate range of sizes. Larger Accessibility Sizes, found in Accessibility settings, unlocks much larger sizes beyond what Text Size allows. If you need very large text, turn on Larger Accessibility Sizes and use its slider instead.

Will changing my font settings affect my iPhone's performance?

No. Changing text size, turning on Bold Text, or switching typefaces does not slow down your phone or drain the battery. These are purely visual settings with no performance impact.

Can I change fonts in Safari?

Safari ignores the system font setting. To adjust text size in Safari, open a webpage, tap the "aA" button at the top right, and use the slider. This change applies only to that webpage and only while you are viewing it in that session.