You can now now create customized email layouts using a new email layout editor that is accessible from the compose screen in Gmail.

In the layout editor, you can create a new email layout from scratch or select from a predefined set of email templates, which include images, text elements and buttons. To access custom email layouts, compose a new message and click on the Choose layout icon.

Availability

This feature is now available for all UNLVMail (@unlv.edu) and Rebelmail accounts (@unv.nevada.edu). 

Learn more about customized layout in Gmail.