I need help with MAIL!

[KidIcarus]

I am running two accounts. On my g4 I had the option if i am writing a new mail to choose the account. Now I am setting up my MBP and the account pull down button is missing. How do I get that back?

 

[Schroedinger]

open up a new message. On the left hand side, under the address and subject fields will be a pull down menu that will allow you to customize what your default fields are. One of those choices is the account dropdown.