Live Effect Parameter Editor Panel Flyout Menu
The menu item is available when a single object is targeted, and that object contains more than one copy of the selected live effect. Choosing the menu item brings up a small modal dialog through which the copy that should be used as the “master” can be specified:
Live Effect Parameter Editor Sync Effect Copies Dialog
By default, the Preview checkbox is enabled, and the results of the sync operation will be previewed before the OK button is pressed.
Live Effect Parameter Editor Sync Effect Copies