Plug in a projector or TV and Stagemark covers it in black, then asks what to show. Pick a window and only that window goes out. Your mail, chat and notes stay on your laptop.
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 with a black cover and shows that one window on top of it, live.
On your laptop you keep using every window as usual. Drag another window onto the external screen and it disappears under the cover. Mirroring copies your whole screen and extended mode shows everything you put on it. Stagemark shows one window and nothing else.
Choose one or more windows in the menu. Or look at a window and press ⌃⌥⌘A (Windows: Ctrl+Alt+Win+A) to show it right away.
The new screen turns black at once, before anything else can appear. Stagemark asks whether to start output, keep it black, or use it as an extended or mirrored display. It can remember the answer for that monitor.
Only the picked window is shown. Switch windows with ⌃⌥⌘] and ⌃⌥⌘[, freeze the picture with ⌃⌥⌘F or black it out with ⌃⌥⌘B. Press ⌃⌥⌘P to stop.
The audience sees the window you chose, at its own aspect ratio.
The external screen is covered in black and the picked window is drawn on top, live. Other windows dragged there stay hidden under the cover.
Pick slides, a browser window and a demo app, then step through them with ⌃⌥⌘] and ⌃⌥⌘[.
⌃⌥⌘A adds the window you are looking at and shows it at once.
A small preview window shows exactly what the audience sees.
Built around the seconds when a laptop screen usually slips out.
A newly connected screen is covered before anything is shown. If it was mirroring, Stagemark switches it to an extended display first, so your whole screen never goes out.
⌃⌥⌘F holds the current picture while you type a password or look something up. ⌃⌥⌘B blacks out only the audience screen.
If the picked window closes, Stagemark won't switch to another window of the same app by itself. It only suggests one in the menu. Window titles are never shown on the audience screen.
The menu bar, Dock and taskbar stay on your laptop, and Stagemark never covers the main display.
When you're not presenting, the same app keeps your desk in order.
Halves, quarters, thirds, maximize and next monitor, with the same keys as Magnet. Turn them off if you already use another app.
Put the pointer on a window's title bar and swipe with two fingers: left or right for halves, up to maximize, down to undo, diagonally for corners.
Remember where each window goes with the laptop alone and with your desk monitor. Plug in and windows go back to their places.
Stagemark remembers where the shown windows were. When you start output, it opens their apps in the background without bringing them to the front.
On Windows the Win key takes the place of ⌘. Putting every window back uses R instead of L, because Win+L locks the screen.
| Mac | Windows | What it does |
|---|---|---|
| ⌃⌥⌘P | Ctrl+Alt+Win+P | Start or stop output |
| ⌃⌥⌘] | Ctrl+Alt+Win+] | Next picked window |
| ⌃⌥⌘[ | Ctrl+Alt+Win+[ | Previous picked window |
| ⌃⌥⌘F | Ctrl+Alt+Win+F | Freeze the audience screen, or unfreeze |
| ⌃⌥⌘B | Ctrl+Alt+Win+B | Black screen, or back |
| ⌃⌥⌘A | Ctrl+Alt+Win+A | Show the front window |
| ⌃⌥⌘S | Ctrl+Alt+Win+S | Remember the front window's position |
| ⌃⌥⌘L | Ctrl+Alt+Win+R | Put every window back in place |
| Mac | Windows | What it does |
|---|---|---|
| ⌃⌥← ⌃⌥→ ⌃⌥↑ ⌃⌥↓ | Ctrl+Alt+← Ctrl+Alt+→ Ctrl+Alt+↑ Ctrl+Alt+↓ | Left, right, top or bottom half |
| ⌃⌥U ⌃⌥I ⌃⌥J ⌃⌥K | Ctrl+Alt+U Ctrl+Alt+I Ctrl+Alt+J Ctrl+Alt+K | Top left, top right, bottom left, bottom right |
| ⌃⌥D ⌃⌥F ⌃⌥G | Ctrl+Alt+D Ctrl+Alt+F Ctrl+Alt+G | Left, center or right third |
| ⌃⌥E ⌃⌥T | Ctrl+Alt+E Ctrl+Alt+T | Left or right two thirds |
| ⌃⌥↩ ⌃⌥C | Ctrl+Alt+Enter Ctrl+Alt+C | Maximize or center |
| ⌃⌥⌫ | Ctrl+Alt+Backspace | Back to the size before arranging |
| ⌃⌥⌘→ ⌃⌥⌘← | Ctrl+Alt+Win+→ Ctrl+Alt+Win+← | Next or previous monitor |
If another app already uses a shortcut, Stagemark tells you at the top of its menu. Swiping on the title bar does the same arranging without keys.
Both Mac and Windows give you two ways to use a projector: copy the whole screen, or extend the desktop onto it. Stagemark adds a third: one window, nothing else.
| Mirroring | Extended display | Stagemark | |
|---|---|---|---|
| The audience sees only the window you pick | Whole screen | Everything placed there | Yes |
| Mail, chat and notifications stay on your laptop | No | If you keep them off that screen | Yes |
| Covered in black the moment you plug in | No | No | Yes |
| Freeze or black out the audience screen | No | No | Yes |
| Switch the shown window with a shortcut | No | No | Yes |
| Keep working on the laptop while presenting | Everything you do is shown | Yes | Yes |
| Click and type on the external screen | Yes | Yes | View only |
Both versions have the same features and the same shortcuts, with the Win key in place of ⌘.
macOS 13 Ventura or later · menu bar app
Windows 10 (version 2004) or later · system tray app
Stagemark draws the window live and keeps nothing.
No recording, no upload. The picked window is drawn straight onto the external screen. Nothing is saved or sent anywhere.
No account, no analytics. There's nothing to sign in to and no usage tracking.
Network only for buying and updates. The Mac version contacts the license server when you enter a key and about once a week to check it, and looks for updates. The Windows version uses the Microsoft Store.
Titles stay off the big screen. The audience screen never shows window titles or app names.
Honest limits, so you know what to expect.
Mirroring copies the whole screen and extended mode shows every window you place on the projector, so macOS on its own can't keep it to one window. With Stagemark, pick the window in the menu and plug in: the projector is covered in black and only that window is shown. See the step-by-step guide.
Win+P has four modes: PC screen only, Duplicate, Extend and Second screen only. None of them shows a single window. Stagemark covers the second screen and shows only the window you pick. See the Windows guide.
The new screen is covered in black right away. If it came up mirroring, Stagemark switches it to an extended display first. Then it asks: start output, keep it black, use it as an extended display, or use mirroring. Tick “Don't ask again for this monitor” and it will do the same next time. If you plug in several monitors, each one is covered and asked about in turn. Every choice is explained in the user guide.
No. Only the picked window is drawn on the external screen. Your laptop stays the main display, so notifications, the menu bar and the Dock or taskbar appear there. Windows dragged onto the external screen stay under the black cover.
Yes. Press ⌃⌥⌘F (Windows: Ctrl+Alt+Win+F) and the audience screen holds the current picture. Type a password or switch tabs, then press it again to go live. ⌃⌥⌘B shows black instead.
Since macOS 15.2, Screen Mirroring can share one window or app with an AirPlay display such as a TV, and some setups offer it over a cable too. Stagemark also runs on macOS 13 and 14, covers a newly plugged-in screen before anything shows, and adds freeze, black screen, a preview and switching between several windows with one shortcut.
It works with any normal app window: slides, a browser window, a video player, a code editor. Copy-protected video may show up black. Presenter view in Keynote or PowerPoint uses both screens by itself, so pick the slide window instead if you want Stagemark's cover and shortcuts.
$9.99, once, with a 7-day free trial. Every feature is included and there's no subscription. The Mac version is sold on this site; the Windows version is coming soon to the Microsoft Store. When the trial ends, stopping output and removing the cover still work.
Screen Recording, to draw the picked window on the external screen. Accessibility is asked for only when you first arrange windows or use window positions. The Windows version needs no permissions.
Yes. It uses the same keys as Magnet for halves, quarters, thirds, maximize and next monitor, and you can swipe on the title bar with two fingers instead. If you already use another arranging app, turn Stagemark's keys off in the menu.
English, Korean, Japanese, Simplified Chinese, Spanish, German, French and Hindi. It follows your system language and falls back to English.
Short answers to the questions people ask before a talk or a class.
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.
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.
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.
Freeze what the audience sees, then type a password or look something up on your laptop. Projector remotes, slideshow keys and Stagemark compared.
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.
How to use Stagemark on a Mac: permissions, picking windows, plugging in a monitor, freeze and black screen, arranging windows and the license key.
Stagemark is coming soon to Mac and Windows.
macOS 13 Ventura or later · Apple silicon and Intel
Windows 10 (version 2004) or later · Microsoft Store
$9.99, one-time purchase · 7-day free trial · every feature included