How to add a header to the e-text output

Summary:

By default the e-text layout output doesn't have column headers. We have a requirement to add the headers as well for the integration file with the third party. How can we best accomplish it? May be in the e-text template?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):