You can create a synchronization from the Toolbox, Browser, or Model menu.
Use the Synchronization tool in the Toolbox.
Select Model > Synchronizations to access the List of Synchronizations, and click the Add a Row tool.
Right-click the model (or a package) in the Browser, and select New > Synchronization.
For general information about creating objects, see Core Features Guide > Modeling with PowerDesigner > Objects.