Security header
A request security profile header is a Container containing security tokens and with several attributes:
Actor is the name of the intermediary or endpoint the Container is intended for.
Add a "mustUnderstand" tag means whether the message interpretation must end and an error is returned if the endpoint does not understand the header.
The 
button makes it possible to add a security header.
A security header can also be added by right-clicking on the request security profile tree and selecting Add a security header.