This feature must be activated on your account (email [email protected] if needed).
On Account Dashboard:
Go to "Manage Test Sessions"
"Edit Email Invite Template" in upper right.
To create a new template, click on "Create New Template" button on far right.
Enter a title for the template (based on job position, etc.)
Enter the subject line and body of email.
Click the "Add" button to save.
Template will now be available to select in the "Email Template" drop down list when creating your test session.
In the Popup: