Split your monitor screen by dragging windows side by side, or use built-in tools that snap windows into halves and quarters automatically
You can divide a single monitor into separate work areas without buying a second display. The simplest method is to drag one window to the left edge and another to the right, leaving them both visible at once. Most operating systems also include a snap feature that resizes windows to fit exact portions of the screen — typically half the width, or quarter sections — so you do not have to position them by hand.
Which method works best depends on what you are doing. Dragging windows works for any task but takes a few seconds each time. Snap features are faster if you switch between the same two or three layouts repeatedly. Some people use both: snap for their main work areas, then drag smaller windows on top as needed.
Key Takeaways
- Windows 10 and 11 snap a window to half the screen when you drag it to the left or right edge, or press Windows key + left or right arrow.
- macOS lets you drag a window to the top-left or top-right corner and hold it there until a menu appears, then select the space it should fill.
- You can snap windows into quarters on Windows by dragging to a corner, or use keyboard shortcuts like Windows key + up arrow to snap to the top half.
- Third-party tools like Rectangle (Mac) or PowerToys (Windows) offer more snap layouts and keyboard shortcuts if your system's built-in features do not meet your needs.
Dragging windows to split the screen on Windows
Open the two programs or windows you want to see at once. Click and hold the title bar of the first window, then drag it all the way to the left edge of the monitor until you see a faint outline showing the left half of the screen. Release the mouse. The window snaps to fill the left half.
Click the title bar of the second window and drag it to the right edge. Release when you see the outline for the right half. Both windows now occupy the screen side by side, each taking up roughly half the width. You can adjust the dividing line between them by moving your cursor to the edge where they meet, then dragging left or right.
If dragging does not snap the window, your system may have snap disabled. Check Settings > System > Multitasking and turn on "Snap windows" if it is off.
Using keyboard shortcuts to snap windows on Windows
Keyboard shortcuts are faster if you do this often. Click the window you want to snap, then press Windows key + left arrow to snap it to the left half. Press Windows key + right arrow to snap to the right half. The other half of the screen shows your desktop or other open windows.
You can also snap to quarters. With a window active, press Windows key + up arrow to snap to the top half, then Windows key + left arrow to move it to the top-left quarter. Repeat with the right arrow to fill the top-right quarter. Use Windows key + down arrow to snap to the bottom half, then left or right to position in the bottom quarters.
These shortcuts work on Windows 10 and 11. Older versions of Windows do not include snap features, so you will need to drag windows manually or use a third-party tool.
Splitting the screen on macOS
macOS does not snap windows by dragging to the edge the way Windows does. Instead, open the two windows you want to use, then click and hold the green maximize button (the button in the top-left corner of the window, next to the red close button) for about one second. A menu appears showing layout options: left half, right half, or full screen.
Select "Tile Window to Left of Screen" or "Tile Window to Right of Screen." The window resizes to fill that half. Click the other window and repeat, choosing the opposite side. Both windows now split the screen evenly.
If the green button menu does not appear, your Mac may be running an older version of macOS. You can still drag windows manually to position them side by side, but you will need to resize them by hand using the corner or edge of each window.
Snapping windows into quarters and custom layouts
Windows 11 includes a snap layout feature that shows preset arrangements when you hover over the maximize button. Click the maximize button (or press Windows key + Z) and a grid appears showing options like two columns, three columns, or four quarters. Click the layout you want, then select which window fills each section.
Windows 10 does not have this grid feature built in, but you can achieve the same result by snapping windows one at a time using keyboard shortcuts. Snap the first window to a corner using Windows key + up or down arrow, then Windows key + left or right arrow. Snap the second window to a different corner the same way.
If you want more control, third-party tools like PowerToys (free from Microsoft) let you define custom snap zones and assign them to keyboard shortcuts. This is useful if you always want three windows in a specific arrangement, or if you use different layouts for different tasks.
Using third-party tools for advanced splitting
If your system's built-in snap features do not meet your needs, free and paid tools offer more options. Rectangle is a free macOS tool that adds keyboard shortcuts for snapping to halves, thirds, quarters, and custom sizes. PowerToys is a free Windows tool from Microsoft that includes a snap layout designer — you draw the zones you want on your monitor, assign them names, and then snap windows to them using keyboard shortcuts.
Magnet (Mac, paid) and WinSplit Revolution (Windows, free) are older tools that still work on current systems. They let you snap windows using keyboard shortcuts or by dragging to screen edges, and they remember your preferred layouts so you can restore them with a single keystroke.
These tools are optional — the built-in features on Windows 10 and 11, and macOS, handle most everyday splitting tasks. Use a third-party tool only if you find yourself repeatedly arranging the same windows and want to speed up the process.
Adjusting window size and position after snapping
After you snap a window, you can still resize it. Move your cursor to the edge or corner where you want to adjust the size, then drag. The window will not snap back to its previous position — it stays where you drag it until you snap it again or close it.
If you snap a window and then realize you want a different layout, straightforward snap it again to a new position. There is no limit to how many times you can snap or resize. Some people snap windows, then drag them slightly to create uneven splits — for example, snapping one window to the left half, then dragging the dividing line to give it more or less space.
Frequently Asked Questions
Can I split a monitor into more than two windows?
Yes. You can snap one window to the left half and another to the right, then drag a third window on top of one of them (it will float in front). You can also snap to quarters on Windows 11, or use keyboard shortcuts to position four windows in the four corners. The more windows you add, the smaller each one becomes, so splitting into more than three or four is usually impractical on a single monitor.
Will snapping a window change its content or settings?
No. Snapping only resizes the window and moves it to a new position. The program inside continues to work normally. If you snap a web browser, the webpage stays the same. If you snap a spreadsheet, your data is unchanged.
What if my monitor is very wide — can I split it into three columns instead of two?
Windows 11 includes a three-column snap layout accessible from the maximize button menu. On Windows 10, you can use PowerToys to create three custom zones. On macOS, you will need a third-party tool like Rectangle. Alternatively, you can snap one window to the left half, then snap two windows to the right half (one above the other) by snapping to the top-right and bottom-right quarters.
Does splitting the screen slow down my computer?
No. Splitting the screen only resizes windows — it does not use extra processing power or memory. Your computer runs the same whether you have one window open or four. The programs inside the windows use the same resources they would use at full screen.
Can I save a split-screen layout so it opens the same way every time?
Built-in snap features do not save layouts automatically. However, third-party tools like PowerToys (Windows) and Rectangle (Mac) let you assign keyboard shortcuts to layouts, so you can restore your preferred arrangement with a single keystroke. Some advanced users also use automation tools to open specific programs and snap them to preset positions when they start their computer.