To write your content in Author-it you will need to assemble existing objects and create new objects. Start by building your document's structure.
First, create a Book object, which will represent your document and will act as a container for all the other objects that make up the document. You'll see these objects in the book's Content tab. You can now add a Title Page object for your printed output, and a Table of Contents object.
Create a Topic object for every heading in your contents outline. Enter the topic's description and apply a template (Chapter, Normal, and Procedure are the most common), but it's good not to add much text at this stage.