Testing Email Merge Fields from the "Send Test Email" Button

Testing Email Merge Fields from the "Send Test Email" Button

We are uploading all of our email templates to prepare for our Zoho roll out. I have entered in the fields correctly, but when I send a test email to myself from teh "Preview" area that says "Send Test Email", the fields never populate (please see attached photos).

Is there a way to test the merge fields other than the "Send Test Email" button?

Please let me know as this is extremely important for my organization.

Thanks,
Kendra