If you decide to deactivate synchronization, the model and its source code remain as they were after the last synchronization.
You can deactivate synchronization in the following ways:
In the Model Explorer, right-click the model item and select Synchronize in the contextual menu, deselect Synchronized, and click Finish.
In the Navigator, right-click the model and select Properties in the contextual menu, deselect Synchronized in the PowerDesigner page, and click OK.
In the Navigator, right-click a synchronized package and select Unsynchronize.