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Select the leader zone.
In Presentation Settings > Interactive > Synchronization (under the Networking tab), select Enable enhanced synchronization and choose Master (note that this language will soon change to Leader).
Select a follower zone in your presentation.
In Presentation Settings > Interactive > Synchronization, select Enable enhanced synchronization and choose Slave.
Do this for all the follower zones in your presentation, then Save and Publish. You can also select Save as and Publish the presentation with a different name for additional players (for example “Player 3 follower presentation”).
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