To send emails to people in your event, go to Email and then New email message.
There are a few different types of campaigns you can send:
Regular email With this campaign you manually enter the recipients' email addresses and the email content.
Form responses Send an email to all people who have filled in a specific form.
People in the event Here you can send to either all people under the event, or only certain groups or types of people.
Staff Schedules Send work schedules to scheduled staff.