From your Orders list, choose the Order you'd like to send an email for.
Click on the Email button to display your email options
For all of the email options (except the Simple Email), you have the option to click either SEND NOW or MORE OPTIONS.
SEND NOW: This feature simply sends the email that you have customized to automatically go to the customer. With one click, the email is sent and you are notified that the email has been sent.
MORE OPTIONS: By clicking on More options, you have the ability to add additional recipients to the email and/or add additional information to the email.