May 21, 2024
Adjusting font size on an iPhone is easy and essential for accessibility. Learn how to change font size using "Text Size" or other options, such as "Zoom" or "Bold Text." Discover useful apps to customize your display. Troubleshoot common problems and frame font size as an accessibility issue.


Have you ever found yourself straining to read text on your iPhone? Perhaps you’ve noticed that the font size is too small and you wish you could make it larger. Fortunately, changing font size on an iPhone is a simple process that can greatly improve accessibility and ease of use. In this article, we’ll provide you with a step-by-step guide on adjusting your iPhone’s font size, offer quick tips, compare options, focus on accessibility, troubleshoot common problems, and even highlight useful apps.

Step-by-Step Guide

Here’s a step-by-step guide on how to change font size on an iPhone:

  1. Open the “Settings” app on your iPhone.
  2. Scroll down and tap on “Display & Brightness.”
  3. Tap on “Text Size.”
  4. Drag the slider to adjust the font size.

Once you’ve adjusted the font size to your liking, you can exit the Settings app. As you can see, changing font size on an iPhone is a straightforward process. However, let’s take a closer look at each step with some accompanying screenshots.

Step 1: Locate the “Settings” app on your iPhone home screen.

Screenshot of iPhone home screen with Settings app highlighted

Step 2: Scroll down until you see the “Display & Brightness” option and tap on it.

Screenshot of iPhone Settings menu with Display & Brightness option highlighted

Step 3: Tap on “Text Size.”

Screenshot of iPhone Display & Brightness menu with Text Size option highlighted

Step 4: Drag the slider to the left or right to adjust the font size. You can also preview the new font size by reading the sample text above the slider.

Screenshot of iPhone Text Size menu with font size slider

Video Tutorial

If you’re more of a visual learner, we’ve created a short video tutorial showing you how to change font size on an iPhone:

This video provides a step-by-step guide with voice-over explanations, so you can follow along at your own pace.

Quick Tips

If you’re in a hurry and just need a few quick tips for changing font size on an iPhone, we’ve got you covered:

  • Use the “Zoom” feature to temporarily magnify your iPhone’s screen. To activate “Zoom,” go to “Settings,” tap on “Accessibility,” then “Zoom,” and toggle it on. You can zoom in and out by tapping three fingers on the screen and dragging them up or down.
  • Use “Bold Text” to make text more legible. To activate “Bold Text,” go to “Settings,” tap on “Display & Brightness,” then toggle “Bold Text” on. Note that your iPhone will restart after enabling this feature.
  • Use “Larger Dynamic Type” to increase the size of text across different apps. To adjust this setting, go to “Settings,” tap on “Display & Brightness,” then “Text Size,” and toggle “Larger Dynamic Type” on.

Comparison of Options

Now that you know how to adjust your iPhone’s font size, let’s compare the different options available:

  • Using the “Text Size” slider in “Settings” is the easiest and quickest method. However, it only changes the font size within Apple’s own apps, such as Safari, Notes, and Messages.
  • Using “Larger Dynamic Type” will change the font size across different apps that support Dynamic Type, such as Apple News and some third-party apps.
  • Using “Zoom” will magnify your entire screen, including text, images, and other content. This is useful if you need to see everything up close, but it might make your screen appear cluttered or slow down your iPhone.
  • Using “Bold Text” will make text bolder and easier to read. However, it won’t necessarily make text larger, and it may not work with all apps.

Depending on your preferences and specific needs, one of these options may be more suitable for you than the others. Experiment with each option to see which one works best.

Accessibility Focus

While changing font size on an iPhone is useful for everyone, it can be especially important for those with visual impairments or other accessibility needs. Here are some additional tips for adjusting your iPhone’s display:

  • Use “Invert Colors” to switch to a high-contrast color scheme. This is especially helpful for those who have difficulty distinguishing between colors or need more contrast to read text. To activate “Invert Colors,” go to “Settings,” tap on “Accessibility,” then “Display & Text Size,” and toggle “Smart Invert” on.
  • Use “Reduce Motion” to make animations and transitions less distracting. This can be helpful for those who are sensitive to motion or have vestibular disorders. To activate “Reduce Motion,” go to “Settings,” tap on “Accessibility,” then “Motion,” and toggle “Reduce Motion” on.
  • Use “Speech” to have your iPhone read text aloud. This can be helpful for those who have difficulty reading or have dyslexia. To activate “Speech,” go to “Settings,” tap on “Accessibility,” then “Spoken Content,” and toggle “Speak Selection” on. You can adjust the speaking rate and voice in the same menu.

By making these adjustments, you can customize your iPhone’s display to better suit your accessibility needs.


If you find that you’re having trouble changing font size on your iPhone, don’t worry. Here are some common problems and solutions:

  • If you can’t find the “Text Size” option in “Settings,” make sure you’re running the latest version of iOS. You can check for updates by going to “Settings,” tapping on “General,” and selecting “Software Update.”
  • If the font size doesn’t change after adjusting the slider, make sure you’re dragging it to the left or right, not up or down. You may also need to close and reopen the app for the changes to take effect.
  • If your iPhone screen is frozen or unresponsive, try restarting it by holding down the power button and sliding the “Power off” slider. You can also try force-restarting it by holding down the power button and the volume down button simultaneously for at least ten seconds.

If none of these solutions work, you may wish to contact Apple Support for further assistance.

App Focus

Finally, if you’re looking for apps that can help you adjust your font size or customize your iPhone’s display, here are a few options:

  • BigBrowser: This app allows you to enlarge text and images in Safari and other web browsers.
  • Pinch to Zoom: This app lets you zoom in on text, images, and other content in any app by pinching the screen with two fingers.
  • Color Contrast: This app helps you choose a high-contrast color scheme for your iPhone’s display.

Of course, there are many other apps available that can help you customize your iPhone’s display. We encourage you to explore the App Store and find one that works best for you.


By now, you should have a good understanding of how to change font size on an iPhone. Whether you’re adjusting font size for accessibility reasons or simply because you want to make text easier to read, we hope this article has been helpful. Remember to experiment with different options to find the one that works best for you. And if you’re experiencing any problems, be sure to troubleshoot accordingly. With a few simple adjustments, you can greatly improve your iPhone’s display and make it easier to use.

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