Model Chat In Enterprise Architect 13

The Discussions window provides the facility of following and participating in quick conversations on a point of interest, with members of a selected user group. The user groups are those defined in User Security.
Each initial comment or response is a separate message, listed in the Discussion Window's 'Model Chat' tab in date/time order, with the most recent message at the top of the list. The messages are independent of the currently selected model object and the full list displays whenever the user group is selected in the 'Model Chat' tab. As the messages are independent of any model object, they do not appear in the 'Discussion Review' tab (Manage Discussions) or 'Recent Discussions' report (which are element-based).
You can filter the messages by the time interval prior to today, and you can set up a check to notify you when new messages are posted by members of one or more user groups.