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

Split screen divides your display so you can work in two programs at once without switching back and forth. On Windows, you drag a window to the left or right edge and it snaps to fill half the screen. On Mac, you enter full-screen mode and swipe to set up Split View. Both systems let you resize the divider between windows, so one program can take up more space if you need it.

The method depends on your operating system. Windows 10, Windows 11, and recent versions of macOS all have built-in split-screen tools that require no extra software. Older systems may not have this feature, or it may work differently.

Key Takeaways

  • On Windows, drag a window's title bar to the left or right edge of your screen until it snaps into place as half the screen.
  • On Mac, open an app in full screen, swipe left or right with two fingers on the trackpad, and click the app you want to pair it with.
  • You can drag the divider between split windows to give one program more space than the other.
  • Split screen works best on larger monitors where both windows remain readable; on small screens, text and buttons may become cramped.

How to split screen on Windows 10 and Windows 11

The easiest method is the drag-and-snap approach. 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. When the window reaches the edge, it will snap to fill the left half. The right half of your screen now shows your desktop or other open windows. Click on the program you want in the right half, and it will fill that side.

If dragging does not work, try the keyboard shortcut instead. Open your first program and press Windows key + Left arrow. The window snaps to the left half. Then open your second program and press Windows key + Right arrow. Both programs now occupy half the screen each.

To adjust how much space each window takes, move your cursor to the dividing line between them. The cursor will change to a resize arrow. Click and drag left or right to give one program more room. Release when you reach the width you want.

How to split screen on Mac

Mac uses a feature called Split View that works inside full-screen mode. Open the first program you want to use. Move your cursor to the green full-screen button in the top-left corner of the window (next to the red close button and yellow minimize button). Hold your cursor there until a menu appears, then click Enter Full Screen.

Once the first program fills your entire screen, swipe left or right with two fingers on your trackpad. A gray panel appears on one side showing your other open programs. Click the program you want to pair with the first one. It will fill the other half of the screen. You now have two programs in Split View.

To resize the divider, move your cursor to the line between the two programs. When the cursor changes to a resize arrow, click and drag to shift the boundary. You can also exit Split View by pressing the green full-screen button again or swiping with two fingers to return to normal view.

When split screen does not work or is unavailable

Some older versions of Windows (7 and earlier) do not have snap-to-edge functionality. If you are using an older system, you can manually resize windows by dragging their edges, but you will not get the automatic half-screen snapping. Consider upgrading your operating system if split screen is important to your workflow.

On Mac, Split View only works when a program is in full-screen mode. If you try to set up it and nothing happens, check that your first program is actually in full screen (the green button should show a double-arrow icon, not a single arrow). Some older Mac models running versions before macOS 10.11 do not support Split View at all.

If your monitor is very small (under 13 inches), split screen may make both windows too cramped to read comfortably. In that case, using Alt+Tab on Windows or Command+Tab on Mac to switch between full windows may be more practical.

Resizing and managing split-screen windows

Once you have split screen set up, you can fine-tune the layout. The divider between windows can be dragged to any position—you are not locked into a 50/50 split. If you need one program to take up 70 percent of the screen and the other 30 percent, drag the divider accordingly. This is useful when you are reading reference material in a narrow window while writing in a wider one.

You can also exit split screen at any time. On Windows, drag a window away from the edge, or press Windows key + Up arrow to restore it to a floating window. On Mac, press the green full-screen button again or swipe with two fingers to exit Split View. The programs return to their previous state.

Split screen on ultrawide and multi-monitor setups

If you have an ultrawide monitor (over 30 inches), Windows allows you to snap windows to quarters of the screen instead of halves. Press Windows key + Left arrow to snap to the left quarter, then press it again to cycle through different snap positions. This lets you fit up to four programs on one ultrawide display.

If you have two or more separate monitors, split screen works on each monitor independently. You can have one split-screen pair on your main monitor and another pair on your secondary monitor. Dragging a window to the edge of one monitor will snap it within that monitor only, not across both.

Troubleshooting split screen problems

If snap-to-edge is not working on Windows, check your system settings. Open Settings > System > Multitasking and make sure Snap windows is turned on. If it is already on, try toggling it off and back on. You may need to restart your computer for the change to take effect.

On Mac, if Split View is not responding, make sure you are swiping with exactly two fingers on your trackpad. Using three or four fingers activates Mission Control instead. Also confirm that the program you are trying to add to Split View is actually in your dock or open in the background—you cannot add a program that is not running.

If one window is frozen or not responding, you may not be able to resize the split. Try closing the frozen program and reopening it, then reactivating split screen. On Windows, you can also press Alt+F4 to force-close an unresponsive window.

Frequently Asked Questions

Can I have more than two windows in split screen at once?

On standard monitors, no—split screen is designed for two programs. On ultrawide monitors with Windows, you can snap to quarters and fit four programs, but this requires a very wide display. Mac Split View is limited to two programs per screen.

Does split screen work with all programs?

Most programs work fine in split screen. Some older or specialized software may not resize properly or may have display issues when squeezed into half a screen. If a program looks broken in split screen, try using full windows instead.

Will split screen slow down my computer?

Running two programs at once uses more memory and processing power than running one, but split screen itself does not add overhead. If your computer is slow, it is because of the programs running, not the split-screen feature.

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

Windows and Mac do not automatically remember split-screen layouts between sessions. You will need to set up your split screen each time you restart. Some third-party window management tools can save layouts, but the built-in split screen does not have this feature.

What is the difference between split screen and virtual desktops?

Split screen shows two programs on the same screen at the same time. Virtual desktops (Windows 10/11 and Mac) let you create separate workspaces and switch between them, but only one workspace is visible at a time. They serve different purposes—use split screen when you need to see both programs, and virtual desktops when you want to organize programs by task.