Business Company Letterhead Design – Letterhead templates aren’t easy to utilize, but there are some tips to make the task easier. Let’s first look at the different types of letterhead formats. There are two main types of format for letters, the single-line form, and double line forms. Let’s look at the differences between these two formats before proceeding to the primary concept behind letterhead templates. Your company letterhead templates will likely have your company’s name, logo, a description of your business and contact details.