You can create, edit and delete Letter Templates by navigating to:
Company Settings > Letters
Click on ‘New’ on the top right to create a new letter template.
Fill in all the required information for your letter template and any parameters.
Once you click ‘Save’, you will be presented with the letter builder, where you can create a letter from scratch or copy-paste in an existing letter you have. Please read this article for more information about using the document and letter builder.
You can download, preview, save, and print the letter template via the options on the top right. Once saved, it will appear under Your letters when you create a new letter.