Revealing your presentation's To be able to give their full attention to content, audience members need structure-in other words, they need a map of some sort (a table of contents, an object of the document, a preview), and they need to know at any time where they are on that map. A written document includes many visual clues to its structure: section headings, blank lines or indentations indicating paragraphs, and so on. In contrast, an oral presentation has few visual clues. Therefore, even when it is well structured, attendees may easily get lost because they do not see this structure. As a speaker, make sure you reveal your presentation's structure to the audience, with a preview, transtons, and a review The preview provides the audience with a map. As in a paper, it usefully comes at the end of the opening (not too early, that is) and outlines the body, not the entire presentation. In other words, it needs to include neither the introduction (which has already been delivered) nor the conclusion (which is obvious)- In a presentation with slides, it can usefully show the structure of the body on screen. A slide alone is not enough, however: You must also verbally explain the logic of the body. In addition, the preview should be limited to the main