If you moved from two monitors to one ultrawide, you have probably noticed what went missing. Fullscreen video stretches across the whole panel. A maximised window fills all of it. In a Teams or Zoom call, sharing your screen sends a strip so wide that the other side can't read it. And there is one taskbar where there used to be two.
All of that happens for one reason: Windows counts one display. What you can fix depends on which of the approaches below you use.
The ways to divide an ultrawide
- Window snappingBuilt into Windows · free
- Snap layouts (hover over a window's maximise button, or press Win + Z) and tools such as PowerToys FancyZones place windows in zones across the panel.
- Where it stops: it only arranges windows. Windows still sees one display, so fullscreen, screen sharing, maximise and the taskbar behave exactly as before.
- Monitor-splitting softwareDisplayFusion and similar · paid
- DisplayFusion can divide a monitor into sections, each with its own taskbar, where maximise fills one section.
- Where it stops: the sections are drawn by the app, not displays Windows knows about. DisplayFusion's own help guide says fullscreen video and games can't be kept inside a split, and call apps still list one screen to share.
- Picture-by-pictureOn some monitors · free
- Many ultrawides have a PBP mode that shows two video inputs side by side. Connect two cables from your PC and Windows sees two real monitors.
- Where it stops: it needs two free outputs and two cables, the split is usually fixed at half and half, and the monitor often limits refresh rate or features while it is on. Switching back to the full panel for a game means going through the monitor's menu.
- A virtual splitDisplaySplit · $29 once
- DisplaySplit adds virtual displays and shows them on your ultrawide, so Windows treats each part as its own monitor over the one cable you already have.
- What changes: fullscreen fills one side, calls can share one screen, each side gets a taskbar, and you choose the layout: halves, 60/40, a wide centre with two wings, or your own. Game mode hands the whole panel back while a game runs.
Which one you need
If you only want tidy windows, snapping is enough and costs nothing. Start there.
If you want a taskbar per section and maximise to stay in it, monitor-splitting software does that, but fullscreen and screen sharing still see one display.
If your monitor has PBP and you have two spare outputs, it gives you two real monitors without installing anything. Check your monitor's manual for what it disables while PBP is on.
If you want fullscreen, maximise, screen sharing and the taskbar to behave as they did with two monitors, over one cable and in the layout you choose, that is what a virtual split is for.
Splitting an ultrawide with DisplaySplit
- Download and run setup. It takes about a minute and checks that your display is 21:9 or wider.
- Choose a layout. The wizard shows what each new screen will measure, for example two 2560 × 1440 screens on a 5120 × 1440 panel, before anything changes.
- Install the display driver from inside the app. This is what lets Windows count more than one monitor.
- Add your licence key. The split turns on. If you don't confirm that you can see it within 15 seconds, it undoes itself.
You can try the whole setup, including seeing exactly how your display would be divided, before you buy. Ctrl + Alt + Shift + F12 turns the split off instantly from anywhere.
What to know before you split
While the panel is split, G-Sync, FreeSync and HDR are unavailable on the split screens and there is about one frame of added delay. Some streaming services that use hardware copy protection show black on a split screen. Game mode avoids all of this by giving the whole display back while a game runs. The lock and sign-in screens are not split.
Common questions
Can Windows 11 split a monitor into two by itself?
No. Windows can snap windows into zones, but it has no setting that makes one physical display count as two. That takes either a second video input (picture-by-picture) or virtual displays.
Does it work with any ultrawide?
DisplaySplit works with displays 21:9 or wider, such as 3440 × 1440, 3840 × 1600 and 5120 × 1440 panels. Ordinary 16:9 monitors connected alongside are left alone.
Can I split into three?
Yes. A wide centre with two narrower wings (25 / 50 / 25) is one of the built-in layouts, and you can drag the dividers to your own proportions.