Live Presentations

NavSlides Editor ships with a built-in live presentation mode powered by Socket.IO. Present from one machine and let viewers follow along in their own browsers — no external service required. The presenter holds a server-issued presenter token so only the host can drive the deck.

Modes

• Live View (/live/:roomCode): a read-only viewer that mirrors slide changes in real time
• Speaker View (/speaker/:roomCode): the presenter's console with notes, a next-slide preview, and a timer
• Remote Control (/remote/:roomCode): drive the deck from a phone or tablet
• Annotations: pen, laser pointer, highlighter, and eraser tools that sync to all viewers in real time and persist per slide when a viewer rejoins

Presenter controls

• PowerPoint-style navigation: F5, Home, End, and arrow keys
• Black / white screen overlays: press B or W to blank the audience view
• Shared live timer synced between the speaker view and viewers

Starting a session

1. Open a presentation in the editor
2. Click Present → Live
3. Share the generated room code or the URL with viewers

The room state lives in memory on the server (server/services/live-rooms.js); rooms expire when the presenter disconnects.

Implementation notes

• Real-time transport: Socket.IO over the /ws namespace
• Slide-change events are broadcast to every viewer in the room
• Annotation strokes use the same socket to keep latency under one frame