Personalizing the smartphone interface is not just a matter of aesthetics, but also a way to make the use of the gadget more comfortable for the eyes. Owners of Xiaomi, Redmi and POCO devices often wonder how to change the standard appearance of text, as factory settings may not meet the requirements of readability or design. MIUI system and the new HyperOS provide powerful tools for this purpose, allowing you to adjust the size, boldness and even the headset itself without obtaining superuser rights.
Typography changes can be required for a variety of reasons, from the banal desire to stand out to the need to improve the visual perception of information by older people or visually impaired users. The standard Roboto or San Francisco font (depending on the firmware version) sometimes seems too small or, conversely, cumbersome. Fortunately, the algorithms of rendering text in the shell from Xiaomi allow you to flexibly manage these parameters while maintaining system stability.
In this guide, we will take a look at all the customization methods available, from built-in scale sliders to installing third-party files through the Themes system application. You will learn how to activate hidden features, where to look for quality free headsets, and what to do if, after installing a new style, text in the menu becomes unreadable. Understanding these nuances will help you create a truly unique interface.
Basic adjustment of the size and style of text in the system
The first step to personalization is to look at standard system settings that are often ignored by users looking for complex solutions. In modern versions of MIUI 13/14 and HyperOS, the typography section has been significantly redesigned for convenience. To get to the desired menu, you need to follow the Settings → Screen → Text Size. There is a slider that adjusts the scale of the display of characters in all system applications and supported software.
But resizing is just the tip of the iceberg, and the same menu often hides a big text switch or an enlarged text option that changes not only the scale but also the line spacing, which is critical for people with farsightedness. System rendering automatically recalculates the layout of interface elements so that buttons and icons don't bump into each other as the font zooms in, and this ensures the integrity of the user experience.
It is worth noting that some applications can ignore system size settings using their own default values. In such cases, changing the system slider will not give a visible result inside a particular software, for example, in messengers or browsers where zooming is managed separately.
- 📱 Go to the Settings menu through the gear in the notification curtain.
- 👁️ Select the Screen section and then the Text Size item».
- 🔘 Move the slider left or right to reduce or increase the font.
- ✅ Click “Apply” to save the changes and see the result.
It's important to understand the difference between font size and interface element size. If you think the text is small but the icons and buttons are too tight, you might want to change the screen resolution or interface scale in the developer's advanced settings, although this is a more advanced level of customization. For most users, a standard regulator is enough.
⚠️ Note: When you set a maximum text size, some interface elements, such as OK or Cancel buttons in dialog boxes, may crop or become unavailable to click. If this happens, quickly reduce the value back through the same settings menu.
Using the “Themes” app to change the headset
The most popular and safe way to change the shape of the letters (headset) is to use the official Themes store, preinstalled on all Xiaomi devices. This method does not require root rights and allows you to apply changes on the fly, without rebooting the device. Unlike a simple resizing, it changes the character design code, which dramatically affects the perception of the interface.
To get started, open the Topics app and find the Profile tab or the person icon in the bottom menu. From the list that opens, select Fonts. Here's a catalog of available headsets divided into categories: Popular, New, Chinese, and others. Many of them are free but marked with a diamond icon, which means paid distribution.
The installation process is simple: click on your favorite font, select Download, and then the Apply button. The system will automatically apply the new style to all supported areas. However, it is worth considering that some fonts may not have full Cyrillic support, which will result in the display of "quadatics" instead of Russian letters. Always check the preview or description before installation.
☑️ Checking before installing font
There is also a mixer feature in the Themes app that allows you to combine different design elements, but for fonts it works differently: an active font replaces the system one completely. If you want to return everything back, you just need to select a standard font (usually called Classic or Default) in the same Profile menu and click Apply.
- 🎨 Open the “Themes” app on the main screen.
- 👤 Go to the user profile (the icon of the person at the bottom).
- 🔤 Select the “Fonts” section and find the right option.
- ⬇️ Download and apply the selected style, confirming the action.
Special attention should be paid to fonts marked "Dynamic" or "Live" and they can change the shape depending on the time of day or the application running, but this functionality consumes additional CPU resources. For older models of Redmi or POCO phones, it is better to choose static headsets to maintain performance.
Installation of third-party fonts through the file manager
For advanced users who are not satisfied with the assortment of the official store, there is a method of manual installation of files formats.ttf or.mtz. This method allows you to use unique design fonts found on specialized forums or sites. However, it requires more caution, since not all files are guaranteed to be compatible with the MIUI shell.
The method is that the font file must be placed in a directory or opened through a compatible installer application. Often users download.mtz files (the Xiaomi theme format) and try to open them directly. If the system does not respond, it may be necessary to rename the file extension or use a third-party theme installer such as MIUI Theme Editor, although the latter requires more in-depth knowledge.
/data/media/0/MIUI/theme/In some cases, especially on global firmware versions, direct file installation can be blocked by digital signature verification, which can be followed by patches or modified versions of system applications, but can be a risk of system disruption. It is critical to back up data before experimenting with system font files.
| Parameter | Official store | Third-party files (.ttf/.mtz) | Root modifications |
|---|---|---|---|
| Security | Tall. | Medium | Low. |
| Choice of fonts | Limited by catalogue | Limitless. | Limitless. |
| Difficulty | Low. | Medium | Tall. |
| Risk of failure | Minimum | Possible. | High-pitched |
If you choose to use a third-party file, make sure it is marked as compatible with your version of Android (like Android 13 or 14). Old fonts created for Android 9 may not display emoji or special characters correctly in new versions of the system. Always check the date the file was created and the author's reviews.
What to do if the font is not used?
Improved readability: fattyness and smoothing
Text readability depends not only on the size and shape of the letters, but also on their contrast and edge clarity. Xiaomi settings often hide parameters that affect font rendering. For example, the option to “Increase text contrast” (if available in your version of HyperOS) makes black characters more saturated on a light background, which is especially useful in bright sunlight.
You should also pay attention to the Dark Theme settings. When you activate night mode, the system inverts colors, but sometimes the standard font becomes too thin and poorly read on a black background. In this case, it helps to switch to fonts with a bolder type (Bold version), which can be found in the theme store. AMOLED-screen.
Android font anti-aliasing works at the system level, but some custom themes can override these settings, making text a ladder or too blurry. If you notice a deterioration in text quality after you install a theme, try changing the font only, leaving the rest of the design elements standard. This often solves the problem of fuzzy.
- 🌗 Use a dark theme to reduce eye strain in the dark.
- 🔊 Choose fonts marked "Bold" for better visibility.
- 💡 Turn off autobrightness if text floats when the backlight changes.
- 👓 Enable Reading mode in the curtain for a yellowish screen hue.
For visually impaired users, there is a High-Contrast Text mode that adds a stroke to the characters, which can be found in Advanced Settings → Special Features, which makes text visible even on colorful wallpaper or in complex design applications where ordinary black text merges with the background.
⚠️ Note: Installing too bold or decorative fonts can cause text in narrow fields (e.g., in a small box). SMS Or contact names) will be cropped at the edges of the screen. Check the display in different applications after changing the style.
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Use Reading mode in combination with standard font for long-term work with documents, which reduces eye strain more effectively than just changing the headset.
Solving problems with display and font bugs
Often, users are faced with a situation where, after updating the system or installing a new theme, fonts begin to display incorrectly, instead of letters, squares, question marks or characters appear, which indicates damage to the font cache or conflict of versions of encoding on the Android system.
The first step in diagnostics is to reset the font settings to the standard ones, and if that doesn’t work, you need to clear the data from the Themes and Wallpaper and Personalization system application (newer versions of HyperOS have combined features), which will return the system font files to factory status by removing any custom modifications.
In more complex cases, when the problem lies in a particular application (for example, Telegram or Viber does not change the font), you need to look for settings inside the application itself. Messengers often have their own text display engines that ignore Xiaomi’s system preferences, in which case changing the system font will not work.
If you have a third-party font installed, the phone goes into a cyclic reboot, you need to log in to Recovery mode. There you need to reset your settings (Wipe Data), which will delete all user data, so regular backup is critical before experimenting with system graphics.
| Symptoms. | Probable cause | Decision-making |
|---|---|---|
| Squares instead of letters | Lack of Cyrillic | Return the standard font |
| Text is cut off | Too big a scale. | Reduce the size in the settings |
| Fuzzy edges | Low resolution of the topic | Select a theme marked HD/4K |
| Lags of the interface | Sophisticated animated font | Return static type |
And we also have to mention the power saving effect, because in Ultra-Energy Saving mode, the system is forced to switch to a simple black interface with a basic typeface to save power, and don't worry if your beautiful typeface disappears when you turn on this mode, it will come back as soon as you're out of saving mode.
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Most font display problems are solved by returning to the standard headset via the Topics → Profile menu and then restarting the device.