...
To synchronize video states inside of video zones in a BrightSign presentation, you must send a link synchronize Link Synchronize message in a leader zone and receive that message in an event that will listen for that message in follower zones. To do this:
...
As of BrightAuthor:connected 1.19.3 and BOS 9.0.101, you no longer need to use Link Zones (Jam sync) to synchronize presentation zones on a player. Instead, when you want to synchronize zones, use Link Synchronization and it’s follower component called the Synchronization Event. This method only uses software synchronization, not hardware (clock) synchronization.
...
Select the leader presentation.
In Presentation Settings > Interactive > Synchronization (under the Networking tab), select Enable and choose Leader.
Select a follower presentation.
In Presentation Settings > Interactive > Synchronization, select Enable and choose Follower.
Do this for all the follower presentations, then Save and Publish. You can also select Save as and Publish the presentation with a different name for additional players.
...
Make sure that the Domain is set to the same value for both the leader and the follower presentations. For example, if the Domain of leader is set to 10 make sure that the follower(s) are also set to 10.
The Domain value is what differentiates one set of synchronized players from a different set of synchronized players on the same network. This allows for multiple synchronized presentations sets on the same network.
...