Split your screen by dragging windows side by side, or use built-in keyboard shortcuts and snap features that do it automatically

Most computers let you show two or more windows at once without switching back and forth. On Windows, you can snap a window to fill half the screen with a keyboard shortcut or by dragging it to the edge. On Mac, you use Mission Control or the built-in Split View feature. The method you choose depends on your operating system and how much control you want over window size and position.

The fastest way is usually a keyboard shortcut or dragging. If you want windows arranged in a specific pattern—three columns, or one large window with two smaller ones stacked—you may need a third-party tool or manual resizing. This guide covers the native tools built into Windows and Mac, plus the manual method that works on any computer.

Key Takeaways

  • Windows 10 and 11 snap a window to half the screen when you press Windows key + left arrow or right arrow, then select another window for the other half.
  • Mac users can open Mission Control (F3 or swipe up with four fingers) and drag one window onto another to create Split View, which divides the screen evenly.
  • Dragging a window to the top, left, or right edge of your screen triggers snap zones on both Windows and Mac, automatically resizing it to fit that area.
  • Manual resizing works on any computer: grab the edge or corner of a window and drag it smaller, then position windows side by side by hand.
  • Some tasks benefit from three or four windows visible at once, which requires either manual arrangement or a dedicated window manager tool.

Snapping windows on Windows 10 and 11

The fastest method on Windows is the Snap information feature. Press Windows key + left arrow to snap the active window to the left half of your screen. The right half becomes empty. Then click on any other open window, and it automatically fills the right side. You now have two windows side by side, each taking up exactly half the screen.

To snap to the right side instead, press Windows key + right arrow. If you want to snap a window to a corner (taking up one quarter of the screen), drag it to that corner instead of using the keyboard shortcut. Windows 11 also lets you snap up to four windows at once by dragging to different corners, though this works best on larger monitors.

If the snap feature does not set up when you drag a window to the edge, open Settings, go to System > Multitasking, and make sure "Snap windows" is turned on. It is on by default, but some updates or custom configurations may disable it.

Splitting the screen on Mac with Mission Control and Split View

On Mac, the built-in Split View feature divides your screen between two apps. Open Mission Control by pressing F3 (or swiping up with four fingers on the trackpad). You will see all your open windows and spaces at once. Drag one window to the top of the screen and hold it there until the screen highlights in blue on one side. Release the window, and it locks to that half. Then click another window to fill the other half.

Alternatively, open the first app you want to use, then hold down the green maximize button in the top-left corner of its window. The window shrinks to half the screen, and you can choose another app from the dock or Launchpad to fill the other side. This method is faster if you already know which two apps you want to compare.

To exit Split View, move your cursor to the dividing line between the two windows and drag it all the way to one side, or press the green maximize button again on either window. Split View works on any Mac with macOS 10.11 or later.

Dragging windows to snap zones

Both Windows and Mac respond to dragging a window toward the edges of your screen. On Windows, drag a window toward the left or right edge until your cursor reaches the edge, and the window snaps to fill that half. On Mac, drag a window to the top of the screen (toward the menu bar) and hold it there; the screen highlights, and releasing the window snaps it to that side.

This method is useful if you prefer not to memorize keyboard shortcuts. It also gives you more flexibility: you can drag a window to a corner instead of a full half, or drag it to a position between two snap zones if you want an uneven split. The downside is that it takes longer than a keyboard shortcut, especially if you are rearranging windows frequently.

Manually resizing and positioning windows

If you want complete control over window size and position, resize them by hand. Click and hold the edge or corner of any window, then drag it to make it smaller or larger. Once you have sized a window, drag its title bar to move it to the position you want. You can then resize and position a second window to fill the remaining space.

This method works on any computer and any operating system. It is slower than using snap features, but it lets you create layouts that the automatic snap tools do not support—for example, one large window on the left and two smaller windows stacked on the right. It also works if your snap feature is disabled or not available.

To make manual resizing easier, maximize one window first (so it fills the screen), then resize it to the width you want. This gives you a clear reference point for where the other window should start. On a very large monitor, you might want windows narrower than half the screen width so text is easier to read.

Using window manager tools for complex layouts

If you regularly need more than two windows visible, or if you want to save specific layouts and switch between them, consider a dedicated window manager. On Windows, PowerToys FancyZones (free from Microsoft) lets you define custom grid layouts—three columns, one large and two small, or any pattern you design. You drag windows into zones, and they snap to fit. On Mac, tools like Rectangle or Magnet offer similar features.

These tools are optional. The built-in snap features handle two-window splits well enough for most tasks. But if you work with spreadsheets, code, or research that requires comparing three or four documents at once, a window manager can save time and reduce the clicking needed to switch between windows.

Troubleshooting snap that is not working

If snapping is not working on Windows, check that it is enabled in Settings. Open Settings > System > Multitasking and confirm "Snap windows" is on. Also check that your window is not in fullscreen mode; snap does not work on fullscreen windows. If a window is stuck in fullscreen, press F11 or Escape to exit fullscreen first.

On Mac, if Split View is not responding, make sure you are dragging the window to the very top of the screen (where the menu bar is), not just near the top. Also confirm that both apps support Split View; older or specialized apps may not. If an app refuses to snap, you can still resize and position it manually.

If your monitor is very small or your resolution is very low, snap features may not work as expected because the resulting windows would be too narrow to use comfortably. In that case, manual resizing or switching between full-screen windows may be more practical.

Frequently Asked Questions

Can I snap more than two windows at once?

On Windows 11, yes—you can snap up to four windows into the corners of your screen. On Windows 10 and Mac, the built-in tools snap two windows at a time. For more complex layouts, use a third-party window manager like PowerToys FancyZones on Windows or Rectangle on Mac.

Does snapping work on external monitors?

Yes. Snap works across any monitor connected to your computer. You can snap one window to your laptop screen and another to an external monitor, or snap two windows on the same external monitor. The snap zones respond to whichever screen your cursor is on.

Will snapping affect my window size permanently?

No. When you unsnap a window (by dragging it away from the edge or pressing the maximize button), it returns to whatever size it was before snapping. Snapping is temporary and does not change your window's saved dimensions.

What if I want windows of different sizes side by side?

Use manual resizing instead of snap. Drag the edge of one window to make it narrower or wider, then position the other window next to it. You can also drag the dividing line between two snapped windows to adjust how much space each one takes up.

Can I snap windows on a tablet or touchscreen?

On Windows tablets, snap works the same way as on a desktop—use the keyboard shortcut or drag to the edge. On iPad, you can use Split View by swiping from the dock, though the process is slightly different. Android tablets have similar multitasking features, but the exact method depends on your device and Android version.