Monitor Link Card

A dedicated held item that links a monitor block to another block (railway management / poster management / management computer).

Holding / usage

This card has no dedicated GUI. You use it simply by holding it and right-clicking a monitor.

Put the Monitor Link Card on your hotbar and hold it.
Right-click the monitor block you want to link (by default, the right mouse button).

Adjacent, connected monitors are automatically registered together as a single group (you do not need to click each face one by one).
- Right-clicking an already-registered group again unregisters that group.

When registered, "Registered (○ groups)" is shown at the bottom of the screen (above the hotbar).
The registered content can be checked in the tooltip when you hover the card: "Registered: ○".
Shift + right-click (right-click while sneaking) clears all of the card's registered content.

Operation summary

Operation	What happens
Right-click a monitor	Register that monitor (connected group) / unregister if already registered
Shift + right-click	Clear all of the card's registered content
Hover over the card	Check the current registration count in the tooltip

Usage flow

Register monitors on the card with the steps above.
Put the registered card into the monitor slot of the block you want as the source (Railway Management Block / Poster Management Block / Management Computer).
That block's display content is now instantly synced and shown on the registered monitors.

Linkable combinations

Source	Displayed content
Railway Management Block	Station arrivals / next trains + line symbol
Poster Management Block	Slideshow images
Management Computer Monitor	Custom layout

Monitor block placement

A monitor can be a single block or a multi-face monitor (= a grid of rows × columns). When linked with the card, the content is stretched across the entire grid.