[Evolution] Arbitrary (way to modify) 'From' when composing

["ximian com ragweed net" <ximian com ragweed net>]

I'm using the Evolution Snapshot 1.0.8.99 from red-carpet, and was
curious if there was a way to arbitrarily change the 'From' line when
composing a message?

Currently, I'm having to set up a new mail account of type 'None' (one
per e-mail alias) and then select a predefined 'From' when composing a
new message.

Suggestions (or pointers to where this is documented in TFM) are
appreciated.