The document discusses various yays and nays of using different design elements in PowerPoint presentations. Bullets should be used consistently from left to right for readability. Backgrounds should be simple and relevant to avoid distraction. Contrast between text and background colors is important for readability, with dark text on light backgrounds working best. Graphics should be relevant to the content and not overused. Font selection, proximity of elements, and avoiding perceptual differences also contribute to effective presentation design.