To create a cover letter, first go to the Inbox section of your XenFax account. Click on the Send Fax button, after clicking on the fax number you want to send a fax from. Now click on Create Cover Letter.
You can follow this navigation to reach the destination: Inbox -> Fax Number -> Send Fax -> Create Cover Letter.
When you click on the Create Cover Letter button, a new pop-up will open. Provide your name in the Name field and your message in the Notes field. Click on the Save button once you’re done and your cover letter will be created.