[Evolution] Editable 'From:' field ?

[John Affleck <jaffleck shelter-object dyndns org>]

Is there any way to modify the 'From:' field in outgoing messages
directly (As opposed to just selecting an identity ?) I'm trying to get
into the habit of doing the jaffleck+foo thing for different lists and
such and I'm wondering if there's a way to do it other than creating
some 'n' seperate identities..

        Thanks,

        John A.