Xiaomi Redmi 9C is a budget smartphone with a shell MIUI that supports split screen mode (split screen) This feature allows you to use two applications simultaneously, such as watching YouTube videos and chatting to Telegram. However, not all users know how to properly activate the multi-window on this model – especially after the updates MIUI 12/13/14, where the menu interface has changed.
In this article, we will discuss all the working ways to enable split screen on Redmi 9C (including the M2006C3LG and M2006C3MI models), explain why the feature may not work, and provide unique solutions for common errors that are not found in standard instructions, and learn how to configure hotkeys for quick access to split screen and which applications support this mode.
What is a dual screen and why you need it on the Redmi 9C
The split screen mode divides the smartphone display into two independent areas, each with a separate application. On the Redmi 9C with a resolution of 720×1600 and a diagonal of 6.53, this is especially convenient for:
- 📺 Multitasking: simultaneous video viewing and correspondence in messengers.
- 📊 Documentation: Copying the text from PDF In Word without constant switching.
- 🎮 Game streams: broadcast gameplay with overlay of Twitch chat or YouTube.
- 📱 Data comparisons: Excel tables or web pages open nearby.
It is important to understand that not all apps support split screen, for example, Instagram and some banking programs can block work in this mode for security reasons. Also on Redmi 9C, due to limited 2/3 GB of RAM (depending on the modification), the simultaneous operation of heavy applications (for example, PUBG Mobile + Chrome) can cause slowdowns.
⚠️ Attention: On Redmi 9C version MIUI below 12.0.5, the split screen may not work stable. Before setting up, check the firmware relevance in Settings → The phone. → Updating the system.
Official method: enable split screen through MIUI settings
The most reliable method to activate split screen on Redmi 9C is to use built-in MIUI tools. The instructions are relevant for MIUI 12/13/14 firmware (including global and Chinese versions).
Steps:
- Open Settings (the gear icon on the main screen).
- Go to the Special Features section (in some versions – Additional settings → Special features).
- Select Screen Split (or Multi-Window in newer versions).
- Activate the slider Enable the split screen.
- Return to the home screen and open the first app (like YouTube).
- Click on the “Recent” button (square at the bottom of the screen) and hold the app icon.
- In the menu that appears, select Double Screen (or Open in Multi-Window).
- Select the second app from the list of recently used ones.
If the split screen option is not in the settings, this can mean:
- 🔄 An outdated version MIUI (firmware update).
- 📱 Modification of the smartphone for a specific region (for example, the Indian version of Redmi) 9C NFC may have other settings).
- 🔧 Disabled navigation gestures (check in Settings) → Display. → Navigation through the system).
Update MIUI to the latest version
Enable navigation gestures
Close background applications (release RAM)
Check the support for split screen in the right applications-->
Alternative method: splitting through the notification panel
MIUI 13/14 has a fast way to turn on split screen without deep tuning, which works even if the standard path through Special Opportunities is not available.
Instructions:
- Open the first app (like Chrome).
- Swipe down from the top edge of the screen to open the notification bar.
- Find the Multi-Octno icon (two overlapping rectangles) and tap it.
- The screen will split into two parts, and at the bottom will appear a panel with recently opened applications.
- Select the second app for the bottom of the screen.
If the Multi-window icon is not in the notification panel:
- Press on. ⚙️ Edit (pencil in the upper right corner of the panel).
- Find the Multi-window list and drag it to the active area.
- Save the changes.
⚠️ Attention: On Redmi 9C 2 GB of RAM while running two heavy apps at the same time (e.g. Facebook) + Google Maps may automatically close the split screen, in which case try using lighter alternatives (e.g. Facebook Lite).
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If the split screen is unstable, try disabling the interface animation in Settings → About Phone → MIUI version (tap 7 times according to version, then select Windows animation: 0.5x).
Screen splitting through gestures (for MIUI 12 and later)
In modern versions of MIUI, split screen can be enabled with a special gesture, which is convenient if you use multi-windows often and want to save time.
How to set up:
- Go to Settings → Display → Navigation gestures.
- Select Full Screen gestures (if not already activated).
- Turn on the Gesture option to split the screen.
- Remember the combination: swipe up from the bottom edge of the screen with a delay (hold your finger for 1 second after the swipe).
How to use:
- Open the first appendix.
- Swipe up from the bottom edge and hold your finger.
- The screen will split and you can select the second app.
If the gesture doesn't work:
- 🔄 Reboot your smartphone.
- 📱 Check if the gesture conflicts with other features (e.g. Google Assistant).
- 🔧 Reset your gesture settings in Settings → Display. → Navigation gestures → Drop it.
| Including | Supported versions of MIUI | Activation rate | Reliability |
|---|---|---|---|
| Through settings (Special Opportunities) | 12, 13, 14 | ⭐⭐ (slowly) | ⭐⭐⭐⭐⭐ |
| Through the notification panel | 13, 14 | ⭐⭐⭐⭐ (fast) | ⭐⭐⭐⭐ |
| Swipe gesture | 12 (with update), 13, 14 | ⭐⭐⭐⭐⭐ (momentarily) | ⭐⭐⭐ |
| Third-party annexes | Anybody. | ⭐⭐ (dependant) | ⭐⭐ |
Third-party applications for split screen (if MIUI does not support)
If you're in your version MIUI There is no built-in dual screen function (for example, on custom firmware or outdated builds), you can use third-party utilities. 9C:
- 📱 Split Screen Launcher – a lightweight app with gesture support.
- 🔧 Multi Window – allows you to adjust window sizes and save templates.
- 🎯 Floating Apps – Creates floating windows (alternative to split screening).
How to install and configure:
- Download one of the apps from Google Play (like Split Screen Launcher).
- Grant permissions to Overlay over other applications (in security settings).
- Follow the instructions in the application to activate the multi-window.
⚠️ Warning: Third-party split-screen apps can slow down your smartphone due to the extra load on the Helio processor G35. If you notice the lags, open the Settings. → Annexes → Permissions and limit background activity of the utility.
How to remove viral applications for multi-window?
Why Screen Split on Redmi 9C Doesn't Work: 7 Reasons and Solutions
If the split screen does not turn on or does not work correctly, the reasons may be as follows:
| Problem. | Reason. | Decision |
|---|---|---|
| No "Share Split" item in the settings | Obsolete version of MIUI or regional restrictions | Update the firmware through Settings → System Update |
| The application does not open in a multi-window | The app does not support split screen | Use an alternative (e.g. Chrome instead of Firefox) |
| The screen splits, but one of the windows is black. | Lack of RAM or conflict with background processes | Close all applications through Recent → Clean everything |
| The split gesture doesn't work. | Conflict with other gestures or a disabled function | Reset your gesture settings in Settings → Display |
| Split screen automatically closes | Processor overheating or low battery charge | Let the phone cool down or plug in the charger |
Unique solution for Redmi 9C: If the split screen fails to work after upgrading to MIUI 14, try resetting Launcher (MIUI shells).
- Go to Settings → Applications → Application Management.
- Find the Launcher (or MIUI Launcher).
- Press Warehouse. → Clear the data.
- Reboot your smartphone.
This will bring back standard interface settings, including hidden multi-window features.
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On Redmi 9C with 2 GB of RAM for stable operation of split screen, it is recommended to disable background data synchronization in Settings → Accounts and synchronization.
How to change the size of windows in the split screen mode
By default, MIUI divides the screen into two equal parts, but you can adjust the proportions to suit your needs, for example, making one window larger for easy video viewing and the other less for chat.
How to resize:
- Activate the split screen mode (by any of the methods described above).
- In the center of the screen will appear a dividing strip (gray rectangle with a dot).
- Press the stripe with your finger and drag it up or down to change the proportions.
- Release your finger when you have achieved the right ratio.
Limitations:
- 📏 Minimum window size – 30% of screen height.
- 🔄 Not all applications support dynamic resizing (e.g. TikTok can automatically return to the standard view).
- 📱 On the Redmi. 9C permittingly HD+ When the window is reduced, the text may become unreadable.
If the dividing strip does not appear:
- Check if immersive viewing mode (full screen mode without buttons) is activated. Turn it off with a swipe down from the top edge.
- Restart both applications in the multi-window.