How to enable screen split on Xiaomi Redmi Note 9: 3 working ways

Xiaomi Redmi Note 9 is one of the most popular smartphones in the budget segment, but not all users know about its hidden features. The split screen (or multi-window) feature allows you to work with two applications simultaneously - for example, chatting in the messenger and watching videos, comparing prices in the browser and app store, or copying text from one document to another. MIUI This option is often hidden in the depths of settings or disabled by default.

In this article, you will find three proven ways to activate split screen mode on the Redmi Note. 9 (including Note models 9 Pro, Note 9S note 9T), And we'll also solve typical problems, from not having a multi-window button to having to crash between applications. MIUI 12/13/14, which are not written in the official instructions.

1. Method: through the notification panel (fastest)

If your Redmi Note 9 runs on MIUI 12 or later, the easiest way to turn on the multi-window is to use the Quick Settings Panel, which takes no more than 10 seconds, but doesn't work on all firmware versions.

Here's how to do it:

• 📱 Open the first app you want to use in split screen mode (like YouTube or Chrome).
• 👆 Swipe down from the top of the screen to open the notification bar.
• 🔄 Find the screen split icon (two rectangular bezels) and click on it. If there is no button, see the list of solutions below.
• 📲 Select the second app from the list of recently opened or through the main menu.

You can now adjust the boundary between the windows by dragging the dividing line up or down. To get out of mode, just pull the line to the edge of the screen or press the Home button.

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If the split-screen button disappeared after the MIUI update, try resetting the notification bar settings: Settings → Notifications Panel → Reset settings.

2. Method: through system settings (universal)

If you don’t have fast access or your version of MIUI doesn’t support gestures from the notification panel, turn on the multi-window through the hidden developer settings.This method works on all versions of the Redmi Note 9, including models with custom firmware.

Follow the instructions:

1. Go to Settings. → The phone.
2. Find the MIUI version and click on it 7 times in a row until you become a developer!
3. Return to the main settings menu and open a new Developer section (usually at the bottom of the list).
4. Scroll down and find the Multi-window or Screen Sharing option (in English, Multi-window).
5. Activate the switch and select Free Form (Arbitrary Split) or Fixed Form (50/50 windows).

Once activated, you can run the multi-window through a long-term click on the “Recent Apps” button (square in the navigation bar) or through the application menu (three dots in the top corner).

The battery is charged more than 30 times%|Free at least 1 GB of RAM|Power-saving modes are turned off|Updated firmware to the latest version-->

Method: by gesture (for MIUI 13/14)

The latest versions of MIUI (13 and 14) have a fast split-screen gesture that works even without the developer settings on, a method that is particularly convenient for users who prefer full-screen gestures over classic navigation buttons.

Algorithm of action:

• 🖐️ Open the first app (e.g. Telegram).
• 👉 Swipe your finger up from the bottom edge of the screen and hold your finger on the screen until the menu of newly opened apps appears.
• 📄 Click on the app icon (at the top of the card) and select Split screen.
• 🔍 Select the second app from the list or through search.

If the gesture doesn’t work, check your gesture settings:

1. Go to Settings → Display → Full-screen display.
2. Select MIUI Gestures and make sure that the Screen Split option is enabled.
3. If necessary, disable the Smart Assistant – it can block gestures.

Through the notification panel|Through the developer settings|By gesture.|Another option-->

Table: Compatibility of multi-window with popular applications

Not all programs support split-screen mode, and here is a list of apps tested and their multi-window behavior on the Redmi Note 9:

Important: Banking apps (SberBank, Tinkoff) and some messengers (Viber, WhatsApp) can block multi-windows for security reasons. If the program does not open in split mode, try to enable the option to allow overlay in special features settings.

Typical problems and their solutions

Even after setting up the screen properly, splitting can malfunction, and here are the most common errors and ways to fix them:

⚠️ Warning: If after activation of the multi-window smartphone begins to brake, close the background applications through Settings → Annexes → Clear.Redmi Note. 9 s 4 GB RAM is recommended to use no more 2-3 multi-window applications simultaneously.

• 🔄 The split-screen button has disappeared from the notification panel Solution: Reset the panel settings (Settings) → Notification panel → Reset) or upgrade MIUI last-minute.
• 🖥️ Windows do not change size Solution: In the developer settings, enable Free Multi-Window Form.
• 🚫 Application does not open in multi-window Solution: Check compatibility in the table above or try running the program through ADB (spoiler).
• 🔋 Fast battery discharge in multi-window mode Solution: Turn off Autobrightness and reduce screen brightness to 50-60%.

How to optimize work in multi-window

To make the screen split on the Redmi Note 9 work as efficiently as possible, follow these tips:

• 📶 Turn off mobile internet in the background: some apps (like TikTok) continue to consume traffic even in a rolled-up window.
• 🔊 Adjust the sound: in a multi-window, the default sound comes only from the active window. To hear both sources, turn on Double Sound in the sound settings.
• 📎 Fix the frequently used pairs: MIUI 14 you can save application combinations for quick launch. To do this, hold the dividing line and select Save pairs.
• 🔄 Use horizontal mode: some apps (like Excel) are more convenient to use in landscape orientation. Turn your smartphone to automatically change the location of the windows.

If you work with texts often, try a combination of Google Docs + Translate or Browser + Notepad. YouTube + Telegram is ideal for watching videos and chats.

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On the Redmi Note 9 with 6 GB of RAM, the multi-window works more stable than on the version with 4 GB. If the smartphone slows down, try closing the background processes through Settings → Apps → Clear the cache.

FAQ: Frequent questions about screen splitting