See "Email Step 2 - Compose and Build"
See "Email Step 3 - Choose Recipients"
See "Email Step 4 - Preview, Test and Create Text Email"
See "Email Step 5 - Schedule Email"
When you choose Save and Review from the Schedule Step or Choose Review and Send from the main Email Builder, you will get a review popup that shows a snapshot of your email, and all the relevant details, contact lists chose and scheduled times.
If you are satisfied, choose Publish and the email will run as scheduled. If you are not quite ready to send, you can save as Draft or Close & Edit.
Once Published, the email will appear in the Schedule tab of your main Marketier dashboard, unless it is scheduled to go through workflow first.