Letterhead Design Format – Letterhead templates might be difficult to work with, but there are some tricks that will you make your work simpler. We’ll first take a look at the different formats for letterheads. There are two types of formats for letterheads, the single-line variant, and the double-line form. Let’s discuss the differences between these two formats prior to moving on to the main idea of letterhead templates. The letterheads for your business will likely contain your company’s name, your logo as well as a description of your company’s mission, and even contact information.