Multi-tasking on the Samsung Galaxy S9 is simplified with split screen, a feature that lets you run two apps side by side. This evergreen guide explains how to open, resize, switch, and close split screen apps, plus how to troubleshoot common issues. Whether you are messaging while browsing, taking notes while reviewing, or comparing two items, split screen helps you stay efficient. Use this reference for reliable, step-by-step instructions that remain useful across software updates.
What is split screen on the Galaxy S9
Split screen is a multi-window feature that divides the display into two panes, each running a separate app. On the Galaxy S9, this capability is built into Samsung’s version of Android and works with many supported apps. It is designed for productivity and convenience, letting you reference one app while interacting with another. Understanding the limits and requirements helps you set realistic expectations for what you can do at one time.
Before you begin
Not all apps support split screen, and performance can vary depending on app complexity and available memory. Make sure your device is updated to the latest software and has enough battery or is connected to a charger for longer sessions. Closing unused background apps can free up RAM and reduce interruptions. Keep in mind that split screen is distinct from pop up view and full screen modes, which offer different ways to manage multiple apps.
Requirements and compatibility
- Apps that explicitly support multi-window
- Enough available RAM for two active apps
- Android version and firmware that include split screen
- Screen orientation set to portrait for easier reading
How to open split screen on the Galaxy S9
You can launch split screen from your home screen or app drawer using touch gestures or the navigation keys. The quickest method involves opening the recent apps list and selecting a two-pane icon. Alternatively, you can use drag and drop gestures to place one app into a split screen layout. Once open, you can adjust the divider to change the size of each app.
Method 1: Recent apps menu
Open the recent apps view by swiping up from the bottom and holding the home button or gesture bar. Tap the split screen icon above an app to choose a second app. This flow is straightforward and works consistently across most supported apps.
Method 2: Drag and drop
Open one app, then drag a second app from the recent list onto the first. The screen divides automatically, placing both apps side by side. This method is fast when you already have one app open and want to add another quickly.
Using and adjusting split screen
After split screen is active, you can switch, resize, or replace either app. The divider between apps is draggable, letting you allocate more space to the app you are focusing on. You can open the recent apps list again to swap one side without closing the other. Knowing these actions helps you maintain control during a session.
Switch or replace apps
- Open the recent apps list and tap a new app to replace the current one on a side
- Use the two-pane icon to swap the secondary app while keeping the primary
- Exit split screen by dragging the divider fully closed or using the close button
Resize the panes
Drag the central divider left or right to change the width of each pane. This is helpful when one app needs more space to display useful content. Note that some apps may not expand or shrink smoothly, especially when they rely on fixed layouts.
Troubleshooting common issues
If split screen does not start or appears blank, check app compatibility, recent app settings, and available memory. Restarting the device can clear temporary glitches, while disabling and re-enabling multi-window features may resolve odd behavior. If one side stays gray or fails to load, try swapping that app for a different one known to support split screen.
Quick troubleshooting checklist
| Issue | Likely cause | Action |
|---|---|---|
| One side is blank | App does not support multi-window | Replace the app with a compatible one |
| Split screen will not open | Multi-window disabled or low memory | Enable in Settings > Advanced features > Multi window |
| Divider cannot be moved | App is in full screen or forced landscape | Change app settings or rotate the screen |
| Performance is slow | Low RAM or background processes | Close unused apps and restart the device |
When to use alternative modes
Pop up view is useful for quick interactions, letting you float a small window that you can move around the screen. Full screen mode focuses on a single app while keeping recent apps a tap away. Choose split screen when you need to see and use two apps at the same time for reading, comparing, or copying information.