How can I preview how an interview details email will look? How do I know it’s actually sent?

How can I preview how an interview details email will look?  How do I know it’s actually sent?

A message saying “sending email” then “Sent” will appear in the blue footer of Perform Zone once SEND is pressed.
A copy of the email will appear in the candidates and contacts NOTES tab

There is no preview option in the Interview Confirmation pop up.
To test that you are happy with the template, apply as a candidate yourself and move yourself to interviewing stage and sending the Interview Confirmation to yourself.