How EA specify Composite diagram

[kayani]

Hi;
I'm trying to use composite structure diagram but struggling to specify following concepts in EA.
1. Specifying an instance which is non-composite part of the containing classifier. According to the UML2 specs [page-187], it should be represented by dashed border, but in EA, i couldn't find how to do it.
2. Role of an instance is suppose to be shown in a format roleName:ClassifierName, as per UML2 specs [p-190]. In EA, using role and name fields under general property tab, I get it in a format like Name/Role. Does Role field here have some other use.
I wonder if there is any specific way or work around to do it according the UML specs.
Thanks.