Previewing what is to follow in a paper or dissertation is like showing a map to a driver; it enables them to see where they are going. So it is useful to think of a preview section as a ‘road map’ for the reader. It must be accurate, but it must be easy to follow.
Writers are also expected to indicate to the reader when they are moving from one topic to another, or from one section of text to another. These are known as transition statements and examples of these, together with some previewing statements, are given below.