iOS 17: How to Change Font Size on iPhone for Better Visibility

Changing the font size on your iPhone with iOS 17 is as simple as heading into your settings, tapping on “Display & Brightness,” and then “Text Size” where you can adjust the slider until the preview text reaches the size you desire. Once you’ve set your preferred text size, your whole phone interface will adjust to match your selection.

After you complete the action, you’ll notice that the text across your iPhone’s user interface will have increased or decreased in size. This change will be visible in your messages, emails, contacts, and most apps that support Dynamic Type.

You can also check out this video about how to change font size on iPhone for more on this subject.


We live in a world dominated by digital screens, and for many of us, our iPhones are our gateways to that world. Whether it’s for work, leisure, or staying connected with loved ones, we use our phones for a myriad of purposes. But what if the text on your iPhone is too small to read comfortably? Or maybe it’s too big and takes up too much screen space? Thankfully, iOS 17 has made it incredibly easy to adjust the font size to suit your needs.

This is not just a matter of convenience; it’s also about accessibility. For individuals with visual impairments, the ability to change font size can make the difference between struggling to use their devices and enjoying a seamless user experience. This article is relevant to anyone who uses an iPhone and wishes to customize their reading experience for comfort and ease of use.

Related: How to Make Text Bigger on iPhone 14

Step by Step Tutorial: Changing Font Size in iOS 17

Before we dive into the steps, it’s important to note that changing the font size can significantly improve readability and can be particularly beneficial for those with visual impairments. By following these steps, you’ll be able to customize your iPhone’s display to your liking.

Step 1: Open Settings

Navigate to your iPhone’s settings. This is where you can customize your device.

The Settings app is your control center for all things iPhone. It’s the place to tweak and personalize features to fit your needs.

Step 2: Tap on Display & Brightness

Scroll down and select “Display & Brightness” from the settings menu.

“Display & Brightness” is where you control how things look on your screen, from brightness levels to text size and more.

Step 3: Tap on Text Size

In the Display & Brightness menu, find and select “Text Size.”

This option gives you the power to adjust the size of the text displayed, making it easier or harder to read depending on your preference.

Step 4: Adjust the Slider

Use the slider to change the font size. Dragging it to the right will increase the size, while moving it to the left will decrease it.

As you move the slider, a preview at the top will show you how the new text size will look in real-time, so you can decide on the perfect size before setting it.


Enhanced ReadabilityAdjusting the font size can make reading on your iPhone a more comfortable experience, especially for those with eyesight issues.
Customized User ExperienceWith the option to change font size, users can personalize their device to better suit their preferences.
AccessibilityThis feature plays a significant role in making the iPhone more accessible to individuals with visual impairments.


Limited App SupportNot all apps support Dynamic Type, meaning some apps won’t reflect the font size changes.
Layout IssuesIncreasing the font size may cause layout problems, with text getting cut off or overlapping in some areas.
Potential ConfusionFor shared devices, changing the text size could confuse other users who prefer the default size.

Video About Font Size

Additional Information

When you’re changing the font size on your iPhone, it’s important to know that not all apps will support the new size. While most of the built-in Apple apps and many third-party apps do support Dynamic Type, which adjusts to your preferred text size, some might not. This means that after you change the font size, you may still encounter apps where the text remains the same size.

But don’t worry, as developers are continually updating their apps to support this feature. Another tip is to combine the text size adjustment with the Bold Text feature, which can make the text even easier to read. And remember, if you’ve got an iPad, these settings will also work there, keeping your experience consistent across devices.


  1. Open Settings
  2. Tap on Display & Brightness
  3. Tap on Text Size
  4. Adjust the Slider

Frequently Asked Questions

Will changing the font size affect battery life?

No, adjusting the font size on your iPhone does not have a significant impact on battery life.

Can I make the font size even larger than the slider allows?

Yes, you can access larger accessibility sizes by going to Settings > Accessibility > Display & Text Size > Larger Text.

Will the adjusted font size be reflected in all apps?

Most Apple apps and many third-party apps support the adjusted font size, but some apps may not reflect the changes.

Can I quickly revert to the default font size?

To revert to the default, you would need to adjust the slider back to the middle position manually.

Does changing the font size also change the size of app icons?

No, changing the font size only affects text and does not alter the size of app icons.


Customizing your iPhone by changing the font size not only tailors your device to your visual preferences but also showcases the accessibility features that iOS 17 offers. Whether you’re doing it for comfort, ease of reading, or to assist with visual impairments, the ability to adjust text size is a small but significant way that iPhones can be personalized for a better user experience.

With the steps outlined in this article, you should now feel confident in adjusting the font size to fit your needs. And remember, playing around with these settings won’t harm your phone, so feel free to experiment until you find the perfect size for you.

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