Create email form/template in ChaRM

Dear Friends,

there is a lot of docu about the technics of email, but a manual "How to setup an email form" is hard to find.
The purpose is that on change of user status in RfC and/or ChangeDocument in ChaRM, email(s) should be sent automatically. As I know about the Action concerned, I should like to learn from you Where and How we can create/maintain such a message.

Thanks in advance,

Regards from NL,

Kees Boer