Hey @Gabe Turner!
Based on the screenshot above, it looks like that customer may be using the HTML version of our Text Only template. Here are our tutorials that will help you get that template in your account, if you'd like (and you may need to tweak it a bit from there, but this should help has a starting point!):
If you're not into coding, you should be able to accomplish something similar by starting with the Text Only template option (the middle one) when creating a new template using our visual editor, as well :)