Is the font in messages too small or, conversely, takes up the entire screen? On Android, the text size can be adjusted both globally for the entire system and separately in each messenger. In this article we will look at all the methods - from standard settings to hidden functions for advanced users.

The problem with text scaling is relevant both for older people and for owners of smartphones with large screens (for example, Samsung Galaxy S23 Ultra or Xiaomi 13 Pro). However, in different versions of Android and shells (MIUI, One UI, ColorOS), the settings menus may differ. We have collected universal solutions that work on 90% of devices.

1. Globally changing the font size in the system

The easiest way is to change the text scale in all applications at once. This will affect not only messages, but also menus, browsers, and social networks. Suitable for users who need single setup for the entire interface.

How to do this:

  • 📱 Open Settings → Screen (or Settings → Display on some models).
  • 🔍 Find the section Font size or Text scale.
  • 📏 Move the slider to the left (decrease) or right (increase). Preliminary options are available on some devices: Small, Medium, Large, Huge.
  • 🔄 Apply the changes - text in messages will update automatically.

On smartphones Samsung with a shell One UI the path may look like this: Settings → Convenience → Visibility → Font size. On Xiaomi (MIUI) — Settings → Screen → Text size.

📊 What font size is more convenient for you?
Very small (saves space)
Medium (default)
Large (for comfortable reading)
Huge (for the visually impaired)
⚠️ Attention: On some devices (for example, Google Pixel with pure Android) Global font enlargement may cause text to be cut off in applications. In this case, try changing the scale separately in the messenger.

2. Setting the text size in standard SMS

If you are using a standard application Messages (or Messages from Google), the font size in it depends on the system settings. However, some firmwares (for example, Samsung or Huawei) have additional options.

Instructions for Samsung Messages:

  1. Open the application Messages.
  2. Tap on the three dots (⋮) in the upper right corner → Settings.
  3. Select Font size or Display.
  4. Set the desired scale (usually 3-5 options are available).

For Google Messages (on pure Android):

  • 🔄 Change the font size through the system settings (see section 1) - in the application itself there is such an option no.
  • 🎨 Alternative: turn on dark theme (Settings → Themes) to make the text more contrast.
Application Availability of font settings Alternative method
Samsung Messages ✅ Yes (in application settings) Global change in the system
Google Messages ❌ No System settings or third-party launchers
MIUI Messaging ✅ Yes (in Settings → Display) Reading mode in screen settings
Huawei Messages ✅ Yes (in Settings → Font) Using themes with high contrast

WhatsApp, Telegram and Viber allow you to adjust the text size regardless of the system. This is convenient if you need to increase the font only in chats, without affecting other applications.

Open application settings|Find the "Chat" or "Display" section|Select font size|Apply changes and restart the messenger-->

WhatsApp:

  • 📱 Open ⋮ → Settings → Chat.
  • 🔍 Tap on Font size.
  • 📏 Select Small, Medium or Large.

Telegram:

  • ☁️ Go to ⋮ → Settings → Appearance.
  • 📱 Select Text size.
  • 🎯 5 zoom levels available (from 80% to 140%).

Viber:

  • 💬 Open More → Settings → Screen and sound.
  • 🔍 Find Text size.
  • 📏 Move the slider to adjust.
⚠️ Attention: Changing the font size only affects the text of messages, but not the names of chats and menus. For full customization, use system parameters. Telegram Changing the font size only affects message text, not chat names and menus. For complete customization, use system settings.

4. Using magnification mode (magnifying glass)

If you need to temporarily enlarge the text in messages (for example, to read small font in screenshots or links), use the built-in magnifying glass functionfunction. magnifiers

How to enable:

  1. Go to Settings → Accessibility → Magnification (or Settings → Convenience → Magnifier).
  2. Activate the switch Short magnification or Magnifying glass.
  3. Adjust the zoom level (usually from 1.2× to 8×).
  4. To use, tap the screen three times or hold two fingers (depending on the model).

On Samsung this function is called Screen enlargement and is located in Settings → Convenience → Visibility. On Xiaomi — Settings → Advanced → Accessibility → Magnifier.

💡

If the magnifier does not work with a triple tap, check if it conflicts with navigation gestures. Disable other gestures in Settings → System → Gestures 5. Hidden settings for advanced users (ADB) If standard methods do not help, you can change the font size through Settings → System → Gestures.

5. Hidden settings for advanced users (ADB)

If the standard methods do not help, you can change the font size via ADB commands. This is relevant for devices with custom firmware or reduced settings (for example, on some models Realme or Oppo).

Instructions:

  1. Enable USB Debugging to Settings → About phone → Build number (tap 7 times) → return to Settings → System → For developers.
  2. Connect the phone to the PC and run the command: 
    adb shell settings put system font_scale 1.3

    where 1.3 is the scale factor (1.0 = standard, 1.5 = increased by 50%).

  3. Reboot the device.

To return the standard size, use: 

adb shell settings put system font_scale 1.0

⚠️ Attention: Inept use of ADB can lead to interface malfunctions. Before experiments, create a backup copy of your data.
What to do if the text is cut off after an ADB command?

If after changing font_scale some interface elements are displayed incorrectly (for example, buttons extend beyond the screen), try:

1. Reduce the coefficient (for example, from 1.5 to 1.2).

2. Return the standard value (1.0) and use the system ones instead. scale settings.

3. Clear the application cache Settings in Settings → Applications.

6.

If the built-in tools are not enough, you can install specialized utilities. They allow you to change the font not only in size, but also in style (for example, to Roboto Bold or San Francisco).

Top 3 applications:

  • 📱 FontFix - changes the system font without root access (requires Android 8+).
  • 🎨 iFont - more than 1000 fonts with size adjustment (works on Samsung, Xiaomi, Huawei).
  • 🔧 Big Font - a simplified solution for enlarging text in messengers.

How to use iFont:

  1. Download the application from Google Play.
  2. Select the font you like and tap Install.
  3. Follow the instructions to activate (a reboot may be required).
  4. Adjust the size in the application settings.

On devices with Android 10 and later, iFont requires permission to change system settings. This can be granted through. ADB command: adb shell pm grant com.kapp.ifont android.permission.WRITE_SECURE_SETTINGS.

7. Solving problems with text display

Sometimes after changing the font size, artifacts appear in messages: cropped text, overlapping letters, or layout errors. Here's how to fix it:

Problem Cause Solution
Text is cut off at the edges Font scale is too large Reduce the size or turn on the "Adaptive scale" mode in the screen settings
Buttons overlap the text Conflict with the theme Reset the theme to standard in the application settings
The font is reset after reboot Cache failure applications Clear the cache in Settings → Applications → [Messenger name] → Memory
Change in WhatsApp does not work Outdated version of the application Update WhatsApp via Google Play

If the problem persists, try:

  • 🔄 Reinstall the messenger.
  • 📱 Check for system updates (Settings → Update Software).
  • 🛠️ Reset screen settings to standard (Settings → System → Reset settings → Reset accessibility settings).

FAQ: Frequently asked questions about the text size in messages

Is it possible to change the font only in one chat, and not in the entire messenger?

No, not a single popular messenger (WhatsApp, Telegram, Viber) supports setting the font size for individual chats. You can only change the scale globally for the entire application or use system settings.

Why did the font size reset after updating Android?

This is standard system behavior - with major updates (for example, from Android 12 to 13), some personal settings are reset. Return the previous settings manually via Settings → Screen → Font size.

How to make the font bold in SMS without changing the size?

There is no such function in standard SMS applications. Alternatives:

  • Use instant messengers (Telegram, WhatsApp) that support text formatting (bold, _italics_).
  • Install third-party SMS clients, for example Textra SMS or Pulse SMS, where there are font style options.

On my Huawei there is no option to change the font in the settings. What should I do?

On some models Huawei (especially with EMUI 12+) setting is hidden. Try:

  1. Open Settings → Screen and brightness → Text and display size.
  2. If there is no option, use Zoom mode (see section 4) or ADB commands (section 5).

Is it possible to change the font color in messages?

The color of the text depends on the theme of the messenger or the system. You can:

  • Enable dark theme (better for the eyes and contrast).
  • Use applications like iFontthat support color schemes.
  • Available on some devices (for example, Samsung) data-i="250">in color filters V Settings → Convenience → Color correction.

💡

For most users, system text scale settings are sufficient. If you need fine-tuning, use ADB or third-party applications, but remember the possible risks (for example, crashes in the text). interface display).