How to stream a tabletop game map to a screen

To put a tabletop game map on a TV or projector, you need two things: a player-facing view of the map and a way to get that view onto the display. Keep those jobs separate. Your map tool decides what players see; the cable or wireless connection carries that picture to the screen.

For a first setup, connect a laptop to the display by HDMI or a compatible adapter, extend the desktop, and place the player-facing window on the second screen. This gives you a clear way to keep notes and hidden rooms on your own display.

Choose a connection that suits the room

One computer and a cable: use the TV as an additional monitor. This is a useful baseline because you can check the input, cable, desktop arrangement, and browser window separately. You still need internet if your map application requires it; HDMI doesn’t make an online tool work offline.

A separate computer at the TV: open the map application’s player display in that computer’s browser. This can suit a permanent table where running a cable from the DM’s chair is awkward. Check whether your application requires an account, campaign access, or a session code on that device. For dm-screen.com, the display needs authentication and campaign access.

Wireless sharing: use a supported browser or operating-system feature with compatible receiving hardware. Test on the equipment and network you’ll use during play. A wireless TV connection and a native casting feature inside a map app are different things.

Set up an extended desktop

Connect the display, choose its input, and confirm that the operating system detects it. In Windows, Windows + P > Extend lets you move windows between screens. On macOS, use System Settings > Displays, select the external display, and choose the extended-display option under Use as. The official Microsoft instructions and Apple instructions cover the available display modes.

Open your map’s player view in a separate window and move it to the TV. Keep the editing window on the laptop. Enter full screen on the TV window after checking that it’s the intended view.

Mirroring the entire DM desktop will also show whatever else you open there. If you’re using mirroring, dedicate the source display to the player view for the whole session.

If you want to cast wirelessly

For Google Cast-compatible equipment, Chrome’s casting guide explains tab and screen sharing. It requires compatible receiving hardware, an updated Chrome browser, and a suitable connection on the same Wi-Fi network. Select the player-facing tab when sharing a tab; check the TV before opening your notes elsewhere.

For a compatible Mac and display, consult Apple’s display-sharing options. The choices depend on the connected equipment and system version. Check whether you’re extending the desktop, sharing a window, or mirroring a whole display.

Try moving the map, revealing fog, and switching scenes over the wireless connection before game night. If that setup is unreliable on your equipment, compare it with a cable connection to help isolate the problem. dm-screen.com supplies a browser game display, not a native casting button or a promise of compatibility with every receiver.

Use the player view, then check a hidden room

A map editor may show secret labels, hidden tokens, or uncovered terrain that players shouldn’t see. Sharing a smaller part of the editor isn’t the same as opening the application’s player view.

In dm-screen.com, open Game screens and choose Full screen map or Open game screen. Select the intended display under Live screens with Set as main screen. The step-by-step dm-screen.com guide covers map activation and fog controls.

For any map tool, do a simple privacy check: hide a room, look at the TV, then reveal it from the laptop. The TV should show exactly the information you intended at each step.

Troubleshoot the layer that’s failing

• No desktop on the TV: check the TV input, cable or adapter, and whether the operating system detects the display.
• Desktop visible but no map: move the correct browser window onto that display and check the map application’s session or login.
• Map visible but the wrong area shown: check the player view’s position and zoom, and any main-display selection in the map tool.
• DM controls visible: the wrong window or whole desktop is being shared. Select the player-facing view before continuing.
• Minis don’t fit the grid: measure a displayed square and adjust the map view. Browser zoom, map zoom, and TV scaling can all change physical size.

Finish by checking readability from the seats your players use. A successful connection is only the first step; the map still needs to be usable from across the table.