You can view a list of all the times a workshared project (the central model or a local copy of the central model) was saved and who saved it. 
 The list also shows any comments entered in the Synchronize with Central dialog. 
- Click Collaborate tab
Synchronize panel
 (Show History). 
 
- In the Show History dialog, navigate to the shared file, select it, and click Open. 
 
- In the History dialog, click the column headers to sort alphabetically or chronologically. 
 
- If desired, click Export to export the history table as delimited text. The delimited text can then be read by a spreadsheet program. 
 
- When finished, click Close.