Split your screen by dragging a window to the edge

The fastest way to split your screen is to grab the title bar of any open window and drag it to the left or right edge of your monitor. When you drag a window all the way to the left edge, it snaps to fill the left half of the screen. Drag another window to the right edge, and it fills the right half. This works on Windows 10 and later, macOS, and most Linux desktops.

On Windows, you can also use a keyboard shortcut: hold the Windows key and press the left arrow to snap the active window to the left half, or the right arrow to snap it to the right half. On macOS, hold Control and press the Up arrow, then select the window you want to use for the left or right side from the menu that appears.

This method works best when you have two windows open and want them side by side. If you need more than two windows visible at once, or if your monitor is very wide, you may need a different approach.

Key Takeaways

  • Dragging a window to the left or right edge of your screen automatically snaps it to fill half the screen on Windows, macOS, and Linux.
  • Windows 10 and later also offer keyboard shortcuts: Windows key + left arrow or Windows key + right arrow to snap the active window.
  • macOS users can hold Control and press Up arrow to open a menu for choosing which window fills which side.
  • For more than two windows at once, use your operating system's built-in grid or use third-party window management software.
  • Ultrawide monitors and multiple monitors may require different window arrangement strategies than standard side-by-side splits.

Using Windows Snap Layouts for four or more windows

Windows 11 introduced Snap Layouts, which let you divide your screen into more than two sections at once. Hover your mouse over the maximize button (the square icon in the top right corner of any window) and a menu appears showing different layout options — two columns, three columns, a large window with smaller ones beside it, and others.

Click the layout you want, then click each empty section to choose which open window fills that space. This is faster than dragging windows one by one if you regularly work with three or four programs at the same time. Windows 10 does not have this feature; it only supports the left-half and right-half snap.

After you set up a layout, Windows remembers it. If you close one of the windows, the others stay in their positions, and you can open a new window and drag it into the empty space.

Arranging windows on macOS with Mission Control

macOS does not have automatic snap-to-edge like Windows, but you can use Mission Control to see all open windows at once and arrange them manually. Press Control + Up arrow (or swipe up with four fingers on a trackpad) to open Mission Control, which shows every open window as a thumbnail. Drag windows around to position them, or drag a window to the top of the screen to enter full-screen mode on a separate desktop.

For a true side-by-side split on macOS, drag a window to the left edge until it highlights, then release. The window enters split-screen mode and shows all other open windows on the right side. Click the window you want on the right, and both fill the screen side by side. Press the Escape key or move your mouse to the dividing line to adjust the split.

Some third-party apps like Rectangle or Magnet add Windows-style snap features to macOS if you prefer that workflow.

Third-party window management software

If your operating system's built-in tools do not meet your needs, window management software gives you more control. On Windows, apps like FancyZones (part of Microsoft PowerToys, which is free) let you define custom grid layouts and snap windows to any section you create. You can save multiple layouts and switch between them with a keyboard shortcut.

On macOS, Rectangle and Magnet are popular paid and free options that add grid snapping and keyboard shortcuts for window positioning. On Linux, most desktop environments (GNOME, KDE, Cinnamon) include built-in window tiling features that work similarly to Windows Snap.

These tools are worth considering if you work with more than two windows regularly or if you use an ultrawide monitor where standard half-screen splits waste space.

Splitting screens on multiple monitors

If you have two or more monitors connected to your computer, each monitor is treated as a separate screen. Snap-to-edge features work on each monitor independently — drag a window to the edge of your left monitor, and it snaps to fill that monitor's half. Drag another window to the right monitor's edge, and it snaps there.

The Windows key + left arrow shortcut snaps the active window to the left half of whichever monitor your cursor is on. If you want to move a window from one monitor to another, drag it across the gap between monitors, or use a third-party tool like DisplayFusion, which adds shortcuts for moving windows between monitors quickly.

On macOS, each monitor has its own Mission Control space, so you can arrange windows independently on each one. Dragging a window to the top of one monitor enters split-screen mode on that monitor only.

Adjusting the split divider after snapping

After you snap two windows side by side, you can adjust where the divider sits. Move your mouse to the line between the two windows until the cursor changes to a resize arrow, then drag left or right to give one window more space. This works on Windows, macOS, and Linux.

If the divider is hard to find, try moving your mouse slowly along the center line of the screen. On some systems, the divider is only a few pixels wide. Once you find it, you can drag it to any position — the windows do not have to be exactly 50-50.

If you want to undo the snap and return a window to its previous size, drag the window away from the edge, or double-click its title bar to unsnap it.

Troubleshooting when snap is not working

If dragging a window to the edge does not snap it, check whether snap is turned on. On Windows 10 and 11, open Settings, go to System, then Multitasking, and make sure "Snap windows" is toggled on. On macOS, open System Settings, go to Desktop & Dock, and check that "Displays have separate Spaces" is turned off (if it is on, split-screen mode will not work).

Some full-screen applications and games disable snap features while they are running. If snap stops working after you open a particular program, close that program and try again. Older monitors or graphics drivers can also cause snap to behave unpredictably; updating your graphics driver may help.

If your monitor resolution is very low or your windows are very small, snap may not work as expected. Snap typically requires at least 1024 pixels of horizontal width to function properly.

Frequently Asked Questions

Can I split my screen into three or four windows at once?

Yes, but the method depends on your operating system. Windows 11 has Snap Layouts that let you divide the screen into up to six sections. Windows 10 only supports two-window splits. On macOS and Linux, you can manually resize and position windows, or use third-party software like FancyZones (Windows) or Rectangle (macOS) to create custom grids.

Does split screen work on a laptop?

Yes. The snap-to-edge feature works on any Windows, macOS, or Linux laptop. On a laptop with a smaller screen, splitting into two windows may make each window too narrow to use comfortably. If that happens, you can adjust the divider to give one window more space, or use a keyboard shortcut to switch between full-screen windows instead.

Will split screen slow down my computer?

Displaying two windows side by side uses slightly more memory and graphics power than displaying one, but the difference is usually not noticeable on modern computers. If your computer is already running slowly, split screen may make it feel slower, but split screen itself is not the cause. Close other programs or restart your computer if performance is poor.

Can I save a split screen layout so it opens the same way every time?

Windows 11 remembers Snap Layouts, so if you set up a layout with specific windows in specific positions, closing and reopening those windows will restore the layout. On macOS, you can use Spaces and Mission Control to organize windows, but there is no built-in way to save and restore a layout automatically. Third-party tools like FancyZones or Magnet can save custom layouts and restore them with a keyboard shortcut.

What is the difference between snap and full-screen mode?

Snap fills half (or a portion) of your screen and leaves the other half visible for another window. Full-screen mode hides everything except one window and the menu bar. Snap is useful when you need to see two programs at once. Full-screen mode is useful when you want to focus on one program without distractions.