In the menu on your left; "Projects" section of "Project Customization", you will access your email and report cover templates. You can create and edit them in this section, but keep in mind that when you create a new assessment project you can create your templates at the same time, and then have them available for other projects. 


In order to know exactly what the invitation and report email templates contain, you can click on "Create new template", in the creation of the templates you will see the text that the system uses by default when sending emails and you can modify it or create a totally new one . You can see in more detail how to use the customization in the section "Creating projects".