Where to find font size settings on your iPhone

Font size on iPhone lives in Settings under Accessibility, not in a general display menu. Open Settings, tap Accessibility, then select Display & Text Size. From there you can adjust the standard text size that appears across most apps — Mail, Messages, Notes, and built-in system text all respond to this slider.

The slider has seven positions, from smallest to largest. Moving it to the right makes text bigger; moving it left makes it smaller. You'll see a preview of the change as you move the slider, so you can stop at the size that works for you before you close the menu.

Key Takeaways

  • Font size settings are in Settings > Accessibility > Display & Text Size, not in the main Display settings.
  • The text size slider affects most built-in apps and system text, but some third-party apps may not respond to this setting.
  • Larger Accessibility Sizes option lets you go even bigger than the standard slider allows, useful if you need text significantly larger.
  • Individual apps like Mail and Messages sometimes have their own text size controls that override the system setting.

Using the standard text size slider

The slider in Display & Text Size is the quickest way to change text across your phone. Drag it left to shrink text or right to enlarge it. The preview text above the slider updates in real time, so you can see exactly how your change will look before you confirm it.

This setting affects the default text size in Mail, Messages, Notes, Reminders, Calendar, and most other Apple apps. It does not affect web pages in Safari — those have their own zoom controls — and some third-party apps ignore this system setting entirely and use their own font size options instead.

Enabling Larger Accessibility Sizes for maximum text enlargement

If the standard slider does not go large enough, turn on Larger Accessibility Sizes. This option appears as a toggle switch below the text size slider. When you turn it on, the slider expands to include five additional larger sizes beyond the standard maximum.

Larger Accessibility Sizes is designed for people who need significantly bigger text. Once enabled, you can drag the slider all the way to the right to reach sizes that would be difficult to read for most users. You can turn this toggle on and off at any time without losing your preferred size setting.

Adjusting text size in individual apps

Some apps have their own text size controls that work independently of the system setting. Mail, for example, has a text size option in its settings menu. Messages also lets you pinch to zoom text in a conversation thread. Safari has a reader mode with its own font controls.

To find app-specific text size options, open the app, look for a Settings or Menu button (usually three dots or lines), and search for Display, Text, or Font options. These app-level controls override the system setting, so if you change text size in Mail's settings, Mail will use that size even if you later change the system-wide slider.

Using Safari's text size and reader mode

Safari does not respond to the system text size slider. Instead, use Safari's built-in zoom: pinch outward on any web page to make text larger, or pinch inward to make it smaller. Your zoom level stays the same for that website until you close Safari or manually reset it.

For a better reading experience on articles and news sites, open Reader mode by tapping the lines icon in the address bar (if available). Reader mode strips away ads and sidebars, then lets you adjust text size using the small and large A buttons that appear in the top right corner of the screen.

Changing bold text and other text appearance options

Below the text size slider in Display & Text Size, you'll find a toggle for Bold Text. Turning this on makes all system text appear bolder and slightly thicker. This is separate from font size and can be used together with any size setting.

The same menu also includes options for Increase Contrast and Reduce Transparency. Increase Contrast makes text and interface elements stand out more sharply. Reduce Transparency removes blur effects from menus and backgrounds, making text easier to read. You can turn any of these on or off independently.

Frequently Asked Questions

Why doesn't the text size slider affect Safari or my email app?

Safari ignores the system text size slider and uses pinch-to-zoom instead. Mail may have its own text size setting in the app's menu that overrides the system slider. Check Mail's settings to see if a custom size is set there.

Can I make text even bigger than the Larger Accessibility Sizes option allows?

Larger Accessibility Sizes is the maximum the system offers. If you need text larger than that, some third-party apps designed for accessibility may offer additional zoom options. You can also use your iPhone's zoom feature (Settings > Accessibility > Zoom) to magnify the entire screen.

Does changing font size affect all my apps?

The system text size slider affects most Apple apps and system text, but not all third-party apps. Some apps use their own font settings and ignore the system slider entirely. Check individual app settings if you notice text size is not changing in a specific app.

Will changing text size drain my battery faster?

No. Changing text size has no effect on battery life. It only changes how text is displayed on your screen, not how hard your phone works.

Can I set different text sizes for different apps?

The system slider applies the same size across all compatible apps. However, apps with their own text size controls (like Mail or Safari) can be set to different sizes individually, and those settings will override the system slider for that app only.