Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.

Co-Region Notation

Co-Region notation can be used as a short hand for parallel combined fragments. You can add this notation to a Sequence diagram using the Co-Region submenu, which you display by right-clicking on a connector in a Sequence diagram and selecting the Co-Region context menu option. There are four sub-options available:

Start at head
End at head
Start at tail
End at tail