Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.
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' option. There are four sub-options available:
- Start at head
- End at head
- Start at tail
- End at tail