Unlike the previous Doc-To-Help versions where documents formed a plane list, Doc-To-Help 2007 uses a document tree to display the hierarchy of source documents. The tree allows you to stay organized and synchronize the source document hierarchy with the table of contents hierarchy.

You determine the position of a document in the document tree when you add or create a new document in the project. The position can be changed later by dragging-and-dropping the document to a new position or by using the Move Up, Move Down, Move Left, and Move Right buttons on the Documents toolbar.