Multi-Monitor Setup Visualizer
See a visual map of your connected monitors, their arrangement, resolution, and relative positions — powered by the Window Management API.
This test uses the Window Management API to detect every connected display and renders a scaled visual map showing each monitor's resolution, position coordinates, pixel ratio, and primary/external status.
The Window Management API reports display positions in CSS pixels with coordinate origin (0,0) at the top-left of the primary monitor, enabling sub-pixel accurate layout mapping of up to 16 screens.
Window Management API not supported. Try Chrome or Edge.
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | All physical monitors detected with correct arrangement | Your multi-monitor setup is properly configured. The visual layout matches your physical arrangement, and all displays are reporting their native or configured resolution. |
| Warning | Monitors detected but arrangement doesn't match physical layout | Display positions in the OS don't match reality. Open system Display Settings and drag monitors to match your physical desk arrangement for correct cursor movement between screens. |
| Bad | Missing monitors or only primary screen detected | Grant Window Management permission, check cable connections, and verify all displays are detected in OS display settings. The API requires Chrome/Edge 100+ for multi-screen detection. |
Common Issues and How to Fix Them
Only one monitor detected when multiple are connected
Click 'Allow' on the Window Management permission dialog. Without this permission, the browser can only see the screen it's currently on. Also verify all monitors appear in OS display settings.
Monitor positions don't match physical layout in the visualization
The test reads position data from the OS. Open System Settings > Display and drag the monitor icons to match your physical desk arrangement, then re-run the test.
Resolution shown as lower than the monitor's native spec
Check OS display settings for scaling. A 4K monitor at 200% scaling reports as 1920x1080 in CSS pixels. The pixel ratio value indicates the scaling factor being applied.