How to show only one window on a second screen in Windows
What Win+P offers
| Mode | What the second screen shows |
|---|---|
| PC screen only | Nothing |
| Duplicate | Your whole screen, including notifications |
| Extend | Whatever you drag onto it, plus the wallpaper |
| Second screen only | Everything, and your laptop screen turns off |
Extend comes closest, but one wrong drag puts a private window on the wall, and the next time you plug in it may come up as Duplicate.
Show one window with Stagemark
- Open the window you want to show.
- Press Ctrl+Alt+Win+A, or click the Stagemark icon in the system tray and choose Pick windows.
- Plug in the projector or TV. The new screen turns black at once and Stagemark asks what to do. Choose Start output. If the screen came up as Duplicate, Stagemark switches it to Extend first.
- Only the picked window appears on the second screen. Your laptop keeps the taskbar and notifications.
If the second screen is already connected, press Ctrl+Alt+Win+P to start and stop output.
While you present
- Switch windows: Ctrl+Alt+Win+] and Ctrl+Alt+Win+[ step through the picked windows.
- Freeze: Ctrl+Alt+Win+F holds the current picture.
- Black screen: Ctrl+Alt+Win+B blacks out only the second screen.
- Keep working: click and type in the original window on your laptop. The second screen only shows it.
Stagemark draws the window with the same DWM thumbnail Windows uses for taskbar previews, so it needs no permissions and no administrator rights.
FAQ
Does Stagemark work on Windows 10?
Yes, Windows 10 version 2004 or later, and Windows 11.
Can people on the second screen click the window?
No. The second screen only shows the window. You control it on your laptop.
What about a video player or a streaming site?
Most video players work. Copy-protected video, such as some streaming services, shows up black.
Do I need to change Win+P back afterwards?
When you stop, Stagemark can either keep the second screen covered or restore it, switching back to Duplicate if that's what it was. Choose which in the menu under When output stops.