Take ownership
While working on a large assembly, you may need to update a particular part. To prevent
      other users from making changes to this part simultaneously, you must take ownership of the
      file.
	 To take ownership of a file within an assembly, do one of the following:
- Click 
 in the PLM toolbar. - In the PLM menu, select Take Ownership.
 
As a result, you are the owner and the file is locked for other users.
Note: When Take Ownership during Edit
        File preference check box is not selected, the users do not get the ownership of
      the files even when they execute Edit File command.