How to change font size on Xiaomi: a detailed guide

Modern Xiaomi smartphones, which are based on MIUI or HyperOS shells, offer users a wide range of personalization options. One of the most popular features is changing the font size, which is especially important for people with reduced vision or those who prefer a minimalistic screen look. Standard settings allow you to adjust text display parameters flexibly without the need to obtain root rights or install third-party applications.

In this article, we will take a look at all the ways you can scale, change the boldness of letters, and even completely replace the system font with Xiaomi. You will learn about the hidden possibilities of the engineering menu and specialized topics that make reading from the screen as comfortable as possible for the eyes.

Standard display settings in MIUI and HyperOS

The basic method of changing text parameters is built into the system menu of each Xiaomi smartphone. To access these settings, you need to go to the Settings section, then select the Screen (or Display) option and find the Text Size option. Here the user can access a slider, moving which, you can choose from five standard sizes, from very small to very large.

But the standard slider isn't the only thing the system offers, and the Fat Text option is often available in the same menu, which makes characters more contrasting and readable, and is especially useful when using thin-serif fonts or in bright sunlight when the contrast of the screen is reduced.

⚠️ Note: When choosing the maximum font size, some interface elements may not display correctly, such as clipping buttons or text in the settings menu.

The changes are instant and affect system applications such as Phone, Messages and Contacts, but it is worth considering that some third-party programs from Google Play font may remain the same if the developer has not pledged support for system zoom settings.

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Use the "enlarged text" function in the special features section, if the standard magnification is not enough - it changes the logic of the interface layout for the visually impaired.

Advanced settings through the special features menu

For users who lack standard zoom options, the MIUI shell features an extended mode. It is on the Settings path → Additional Settings → Special Features → Visual → Enlarged Text. Activating this switch forcefully enlarges the font in all supported applications, ignoring the limitations of the standard slider.

Using magnified text mode can change the structure of screens, for example, on the home screen the number of icons in the row can decrease, and in the contact lists will display fewer names at the same time, a fee for increased readability, which is often chosen by older people.

• 📱 The mode covers system menus and most popular applications.
• 👁️ Improves the readability of small text on social networks and news feeds.
• ⚙️ Does not require rebooting the device to apply changes.

Importantly, it is part of a disability-assisted system, so its interface may be different from the usual display settings, and it focuses solely on readability, sometimes to the detriment of the interface’s estetics.

Installation of third-party fonts through the Topics app

One of the strengths of Xiaomi's ecosystem is the Theme Store, where you can not just change the wallpaper, but also completely replace the system font. To do this, open the Themes app, go to the profile (human icon) and select the Fonts section. The catalog offers thousands of options, from handwritten and gothic to minimalist and monowidth.

After choosing your favorite style, click Download and then Apply. A smartphone can offer a reboot to correctly display the new font in all applications. Most fonts are free, but there are premium options marked with the appropriate icon.

When installing third-party fonts, you should pay attention to user reviews. Some decorative fonts may not read well in small size or do not support Cyrillic, which will lead to the appearance of “squares” instead of letters in Russian-language interfaces.

Manual installation of TTF fonts

For advanced users who do not have enough Themes store assortment, there is the possibility of manually installing font files in the format of.ttf or.otf. This method requires downloading the file from a reliable source and placing it in a special folder of the internal memory of the device. The path usually looks like this: MIUI → theme → content → font.

Once a file is placed in the directory, you need to apply a theme that supports third-party fonts, or use a special module in the Themes app. In new versions of HyperOS, the procedure may differ, as the security system becomes stricter to modify system files.

• 💾 Download a font file from a trusted source (e.g. Google Fonts).
• 📂 Copy the file to the root of internal memory or specified folder MIUI.
• 🔄 Apply the font through theme management menu.

⚠️ Note: Using fonts from unreliable sources can lead to unstable system operation or interface errors. Always back up the data before experimenting.

Manual installation gives you complete control over the appearance of the device, allowing you to use corporate fonts or rare design marks. However, it is worth remembering that not all fonts have a full set of characters, which can cause problems with displaying emoji or special characters.

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Manual font installation requires attention to file paths and compatibility of MIUI versions, but gives maximum creative freedom.

Scaling the interface through the engineering menu

There's a deeper level of customization available through the developer menu, and to activate this mode, you need to quickly click seven times on the build number in the About Phone section, and when you say "You're a developer," a new Developer item will appear in the settings menu.

Within this section, we're interested in Smallest Width, which affects not only the text, but also the size of all interface elements, icons and indentations. The standard value is usually around 360-390 dp. Decreasing the number will make it bigger, zooming in will make it smaller.

This is a huge change in the way you see space on the screen, and unlike just zooming in the font, it rewires the entire interface grid, and it can be useful for Xiaomi Pad tablets or for connecting your smartphone to a large monitor.

Recommended value: 360-400 dp


Minimum safe: 320 dp




Maximum safe: 480 dp

Be careful when you change these parameters, setting extreme values can make the interface unusable when the buttons become too large or microscopic, in which case resetting the settings through the interface will help_recovery_ menu or neatly enter values blindly if the screen responds to touch.

Frequent problems and their solution

Users may face a number of common problems during the setup process, such as resetting font settings to standard ones after upgrading MIUI, regular security behavior that requires reconfiguration, and it is also possible that some applications will keep text small despite global changes.

Another common issue is messaging, where when you get a lot more font, the input fields on WhatsApp or Telegram can be blocked by the send buttons, often by changing the orientation of the screen or temporarily zooming in.

If the font has become unreadable or is gone, it is recommended to clear the cache of the Themes app and System UI. To do this, go to Settings → Apps → All Apps, find the right one and select Clear → Clear the cache. This action is safe and does not delete personal data.

• 🔄 Resetting display settings helps with visual bugs.
• 📱 Updating the Themes app solves compatibility issues.
• 🛠 Checking system updates eliminates known rendering errors.

Understanding the causes of errors allows you to quickly return the comfort of using a smartphone, and in most cases, the problems are software-based and solved by software methods without contacting the service center.