To Synchronize with Central: Click Collaborate tabSynchronize panelSynchronize with Central drop-down (Synchronize Now).
If you want to modify the Synchronize with Central settings before you synchronize with central: Click Collaborate tabSynchronize panel Synchronize with Central drop-down (Synchronize and Modify Settings). The Synchronize with Central dialog displays.
If necessary, click Browse to specify a different path for the central model. Specify the new path in the Central File Location dialog, and click OK.
You can see all comments using the Show History tool. See Viewing Workshared File History.
Your changes are saved to the central model and any changes from other team members are copied to your local model.
If you have saved all changes to the central model, but still have editable elements when you close the local file, the Editable Elements dialog displays.
If you do not want to keep ownership of the checked out worksets and borrowed elements, click Relinquish elements and worksets; otherwise, click Keep ownership of elements and worksets.