Usually when we have long documents it becomes really hard to manage it, especially when we are working with a small part of it. Now with Word 13, we are able to Collapse and Expand a document in order to just view the parts that we need. In order to do this we must follow the steps described below.
First of all we must check out that we are in Print Layout view. In order to do that we must select the View tab and from the area of the ribbon named Views we must select the command Print Layout as shown in the image below.