Split screen lets you see two windows side by side on one monitor

A split screen divides your display so you can work in two programs at once without switching back and forth. One window takes up the left half of your screen, the other takes the right half. You can resize them if you need one larger than the other. The method depends on your operating system — Windows, Mac, and Linux each have their own built-in tools, and most work without installing anything extra.

Split screen is useful when you're comparing documents, copying text between programs, watching a video while reading, or following instructions in one window while working in another. It saves time because you don't have to minimize, maximize, or alt-tab constantly.

Key Takeaways

  • Windows 11 and Windows 10 have a built-in snap feature that automatically resizes windows when you drag them to the screen edge.
  • Mac users can enable Split View in System Settings, then swipe with four fingers or use the green maximize button to activate it.
  • You can resize split windows by dragging the dividing line between them, giving more space to whichever program you need.
  • Some programs don't work well in split screen mode, so test your specific combination before relying on it for important work.

How to split screen on Windows 10 and Windows 11

Windows has a feature called Snap that automatically resizes windows when you position them. Open the two programs you want to use side by side. Click and hold the title bar of the first window, then drag it all the way to the left edge of your screen until you see a preview showing the left half highlighted. Release the mouse — the window snaps to fill the left side.

Your remaining open windows appear on the right side. Click the one you want to use, and it fills the right half. If you don't see your preferred window, click the empty right side and a list of open programs appears. You can also drag a second window to the right edge instead of using the list.

To adjust the split, move your cursor to the vertical line dividing the two windows until it becomes a resize cursor (a double-headed arrow), then drag left or right to give one window more space. Drag all the way to either edge to close the split and return to full-screen mode.

How to split screen on Mac

Mac calls this feature Split View. First, enable it in System Settings: click the Apple menu, select System Settings, go to Dock & Menu Bar, then toggle on "Displays have separate Spaces." This setting lets you manage windows more easily across your screen.

Open your first program, then move your cursor to the green maximize button in the top-left corner of the window. Hold it there until a menu appears asking which side you want the window to occupy. Choose left or right. The window snaps to that side and shows your other open programs on the remaining side. Click the program you want to use, and it fills the other half.

You can also swipe with four fingers on your trackpad — swipe left or right to move between split-screen pairs. To exit Split View, move your cursor to the top of the screen, click and hold the window divider, then drag a window away from the edge.

Resizing and adjusting your split

Once your windows are split, you can change how much space each one gets. On both Windows and Mac, look for the dividing line between the two windows. Move your cursor directly onto that line until it changes shape — on Windows it becomes a double-headed arrow, on Mac it becomes a thicker bar. Click and drag toward whichever side you want to shrink.

You can make the split uneven — for example, 30 percent left and 70 percent right — or drag all the way to one edge to close the split entirely. The window you drag away from the divider returns to floating mode and no longer takes up half the screen.

When split screen doesn't work well

Some programs behave poorly in split-screen mode. Games often don't resize properly or may freeze when they detect a smaller window. Video editing software sometimes disables features when the window is too narrow. Web browsers usually work fine, but some websites detect the smaller window size and switch to a mobile layout, which may not be what you want.

Test your specific combination before relying on it. If a program doesn't work well split, you can still use it full-screen and switch between windows using Alt+Tab on Windows or Command+Tab on Mac. Some people prefer this anyway because it gives each program more room to display its tools.

Using split screen with multiple monitors

If you have two monitors connected to your computer, you don't need split screen — you can run one program on each monitor at full size. However, you can still use split screen on one monitor while using the other monitor for something else. This is useful if you want three windows visible at once: two split on one monitor, one full-screen on the other.

On Windows, snap works on whichever monitor your cursor is on. Drag a window to the edge of the left monitor, and it snaps to that monitor's left side. On Mac, Split View works within a single Space, so you may need to manage Spaces separately if you want split windows on different monitors.

Keyboard shortcuts for faster splitting

Windows 11 offers keyboard shortcuts to snap windows without dragging. Press Windows key + Left arrow to snap the active window to the left half, or Windows key + Right arrow for the right half. Windows key + Up arrow maximizes the window, and Windows key + Down arrow restores it to floating mode. These shortcuts work faster than dragging if you use split screen often.

Mac doesn't have a built-in keyboard shortcut for Split View, but you can create one using System Settings. Go to Keyboard, then Keyboard Shortcuts, select App Shortcuts, and add a custom shortcut for "Enter Full Screen" in your preferred program. This is less direct than Windows, so most Mac users stick with the trackpad method.

Frequently Asked Questions

Can I split my screen into more than two windows?

Not with the built-in split feature — it divides your screen in half only. To see three or four windows at once, you can split one half and leave the other full-screen, or use third-party window management software like Rectangle (Mac) or PowerToys (Windows). These tools let you snap windows to quarters or custom sizes.

Does split screen work on a laptop with a small screen?

Technically yes, but it's often not practical. Each window gets half the width, which on a 13-inch laptop means each side is only about 6 inches wide. Text becomes small and toolbars crowd the space. Most people find split screen more useful on monitors 24 inches or larger.

Will split screen slow down my computer?

Running two programs at once uses more memory and processor power than running one, but the split-screen feature itself doesn't cause slowdown. If your computer feels slow with split screen, the problem is the programs themselves, not the layout. Close one program or use a different one that's less demanding.

Can I save a split-screen setup so it opens the same way next time?

Windows and Mac don't save split-screen layouts automatically. When you close your programs, the split arrangement disappears. Some third-party tools can save window positions, but the built-in feature doesn't include this. You'll need to set up your split each time you want to use it.

What if my window won't snap to the edge?

Make sure you're dragging from the title bar (the bar at the very top of the window with the program name). If you drag from elsewhere, the snap feature won't activate. Also check that Snap is enabled: on Windows 11, go to Settings > System > Multitasking and make sure "Snap windows" is turned on. On Mac, verify that Spaces is enabled in System Settings.