# Stagemark

> Stagemark is a menu bar app for Mac and a tray app for Windows that sends only the window you pick to a projector, TV or second monitor. It covers the whole external screen in black and shows that one window on top, live.

Updated: 2026-11-09. Canonical source: https://stagemark.hhcompany.app/ (pages below are the authoritative, current descriptions).

- Platforms: macOS 13 Ventura or later (Apple silicon and Intel); Windows 10 version 2004 or later.
- Price: $9.99 one-time purchase with a 7-day free trial. The Mac version is sold on this site (Lemon Squeezy license key); the Windows version is coming soon to the Microsoft Store.
- When an external screen is plugged in, Stagemark covers it in black first, switches mirroring to an extended display, and asks: start output, keep black, extended display or mirroring. Several monitors are covered separately and asked about one at a time; each answer applies only to that monitor, and output goes to one monitor at a time. The choice can be remembered per monitor (identified by vendor, model and serial number).
- Output shortcuts (Mac / Windows): start or stop ⌃⌥⌘P / Ctrl+Alt+Win+P; next and previous window ⌃⌥⌘] ⌃⌥⌘[; freeze ⌃⌥⌘F; black screen ⌃⌥⌘B; show front window ⌃⌥⌘A.
- Also arranges windows with Magnet's default keys (⌃⌥ + arrows, U I J K, D F G, E T), by swiping two fingers on a title bar, and puts windows back in place per monitor setup.
- Limits: the external screen is view only; one window at a time; copy-protected video shows black; never covers the main display. If the shown window is minimized, on another desktop or closed, the audience screen stays black and the reason appears in the menu.
- Privacy: nothing is recorded or uploaded; no account and no analytics.
- Languages: English, Korean, Japanese, Simplified Chinese, Spanish, German, French, Hindi.

## Pages

- [Stagemark — English](https://stagemark.hhcompany.app/): Send just the window you pick to a projector, TV or second monitor. Stagemark covers the screen in black the moment you plug in. Mac and Windows.
- [Stagemark — 한국어](https://stagemark.hhcompany.app/ko/): 고른 창 하나만 프로젝터, TV, 보조 모니터에 보여 줘요. HDMI를 꽂는 순간 화면을 검게 덮어서 노트북 화면이 새어 나가지 않아요. Mac과 Windows에서 써요.
- [Stagemark — 日本語](https://stagemark.hhcompany.app/ja/): 選んだウィンドウだけを、プロジェクターや TV、サブモニタに映せます。Stagemark はつないだ瞬間に画面を黒く覆います。Mac・Windows 対応。
- [Stagemark — 简体中文](https://stagemark.hhcompany.app/zh-hans/): 只把你选中的窗口显示在投影仪、电视或第二台显示器上。插上线的那一刻，Stagemark 就用黑色盖住整个屏幕。支持 Mac 和 Windows。
- [Stagemark — Español](https://stagemark.hhcompany.app/es/): Envía solo la ventana que elijas a un proyector, una TV o un segundo monitor. Stagemark cubre la pantalla de negro en cuanto la conectas. Para Mac y Windows.
- [Stagemark — Deutsch](https://stagemark.hhcompany.app/de/): Zeig nur das gewählte Fenster auf Beamer, Fernseher oder zweitem Monitor. Stagemark deckt den Bildschirm schwarz ab, sobald du ihn anschließt. Mac und Windows.
- [Stagemark — Français](https://stagemark.hhcompany.app/fr/): Envoyez uniquement la fenêtre choisie vers un projecteur, une TV ou un second moniteur. Stagemark couvre l'écran de noir dès le branchement. Mac et Windows.
- [Stagemark — हिन्दी](https://stagemark.hhcompany.app/hi/): जो विंडो आप चुनें, सिर्फ़ वही प्रोजेक्टर, TV या दूसरे मॉनिटर पर जाए। केबल लगाते ही Stagemark स्क्रीन को काले रंग से ढक देता है। Mac और Windows के लिए।

## Guides (English)

- [How to show only one window on a projector from a Mac](https://stagemark.hhcompany.app/guides/show-one-window-on-projector-mac/): Mirroring copies your whole screen and extended mode shows everything you drag over. Here is how to put just one window on a projector or TV from a Mac.
- [How to show only one window on a second screen in Windows](https://stagemark.hhcompany.app/guides/show-one-window-second-screen-windows/): Win+P can only duplicate or extend your screen. Here is how to show one app window on a projector, TV or second monitor in Windows 10 and 11.
- [How to stop HDMI showing your whole laptop screen](https://stagemark.hhcompany.app/guides/stop-laptop-screen-showing-on-hdmi/): Plugging in a projector can put your whole laptop screen on the wall before you're ready. Here is how to keep it private on Mac and Windows.
- [How to freeze the projector screen while you keep working](https://stagemark.hhcompany.app/guides/freeze-projector-screen/): Freeze what the audience sees, then type a password or look something up on your laptop. Projector remotes, slideshow keys and Stagemark compared.
- [How to put windows back when you plug in a monitor](https://stagemark.hhcompany.app/guides/remember-window-positions-per-monitor/): Windows pile up on the laptop screen after you unplug a monitor. Here is how to remember window positions per monitor setup on Mac and Windows.
- [Stagemark user guide: menus, shortcuts and settings](https://stagemark.hhcompany.app/guides/user-guide/): How to use Stagemark on a Mac: permissions, picking windows, plugging in a monitor, freeze and black screen, arranging windows and the license key.

## Guides (한국어)

- [Mac에서 프로젝터에 창 하나만 띄우는 법](https://stagemark.hhcompany.app/ko/guides/show-one-window-on-projector-mac/): 미러링은 화면 전체를, 확장 모드는 그쪽에 놓은 창을 전부 보여 줘요. Mac에서 프로젝터나 TV에 고른 창 하나만 보여 주는 방법이에요.
- [Windows에서 보조 화면에 창 하나만 띄우는 법](https://stagemark.hhcompany.app/ko/guides/show-one-window-second-screen-windows/): Win+P로는 화면을 복제하거나 확장하는 것만 돼요. Windows 10·11에서 프로젝터, TV, 보조 모니터에 프로그램 창 하나만 보여 주는 방법이에요.
- [HDMI 꽂을 때 노트북 화면이 그대로 나오지 않게 하는 법](https://stagemark.hhcompany.app/ko/guides/stop-laptop-screen-showing-on-hdmi/): 프로젝터를 꽂자마자 노트북 화면 전체가 벽에 뜰 수 있어요. Mac과 Windows에서 연결하는 순간 화면이 새어 나가지 않게 막는 방법이에요.
- [발표 중 프로젝터 화면을 멈춰 두는 법](https://stagemark.hhcompany.app/ko/guides/freeze-projector-screen/): 청중 화면은 멈춰 두고, 노트북에서는 암호를 입력하거나 뭔가를 찾아봐요. 프로젝터 리모컨, 슬라이드쇼 단축키, Stagemark를 비교했어요.
- [모니터를 꽂으면 창이 제자리로 돌아가게 하는 법](https://stagemark.hhcompany.app/ko/guides/remember-window-positions-per-monitor/): 모니터를 뺐다 꽂으면 창이 노트북 화면에 몰려 있어요. Mac과 Windows에서 모니터 구성마다 창 자리를 기억해 두고 되돌리는 방법이에요.
- [Stagemark 사용 안내: 메뉴, 단축키, 설정](https://stagemark.hhcompany.app/ko/guides/user-guide/): Mac용 Stagemark 사용법이에요. 권한, 창 고르기, 모니터를 꽂을 때 묻는 창, 화면 멈춤과 검은 화면, 창 정렬과 쓸기, 창 자리, 무료 체험과 라이선스 키까지 정리했어요.

## Optional

- [Full text of the site](https://stagemark.hhcompany.app/llms-full.txt): every page above as Markdown
- Windows version: coming soon (Microsoft Store)