Note: Make sure you are logged in and in the correct event
Go to the participants list
Select the participants that you want to email, let's say the 'New' ones and click on the green button 'Email'.
I. Make sure that the template is: Registration Invitation
II. Check if the email layout is final
III. Fill in your subject: e.g You are invited to: VNA 2014!
IV. To preview and check your email appearance, click Update Preview.