Paai FaiOpen a room and share the viewer link
Choose Creative tools → Remote / Light wall → Open a free room. Keep the editor open and scan its QR code on another device. Viewers can receive the sign but cannot change the controller’s settings. Anyone with the viewer link can join and read the message.
Only text, styles and commands pass through the relay. Photos, drawings and music are excluded. Select a local photo on a viewer if needed, or transfer artwork separately in a project file. Close the room after the event to revoke its viewer link.
Position the light-wall screens
Choose solid colour, a slow wave or a moving gradient. Set rows and columns, arrange the devices and select the position on each viewer. Restart the wave after arranging the grid. Solid mode uses the main sign colour.
Time is estimated from server replies. Network delays and display differences remain, so this is not frame-accurate synchronization. Reduced motion and paused playback use a static colour. There is no strobe pattern. Test the grid on the actual devices.
Plan for session limits
The free beta allows 12 rooms per day across the site, 30 minutes per room, 32 viewer screens and 1,000 sign changes. Reaching the quota stops the feature without buying extra capacity. It is intended for trials and short sessions.
Reloading the editor loses its controller credential. A disconnected viewer tries a limited reconnection sequence and reports its actual status; the last sign may remain visible. Expired rooms need a new link. Core local editing remains available without a room or internet connection.