SelectAccount configs>Account configs.
Highlight the account you want to be the default.
opt for account you want to make the default account.
The current default account appears at the top of the list.
In the lower-left corner, selectSettings(gear icon) and chooseSet as Default.
To send a message from an account other than the default account, choose the account underInbox.
Any email you send will befrom that account.
When you are finished, snag the default account under Inbox again.
