What effect do annotations have on documents?

Annotations play a significant role in enhancing the clarity of a document by providing additional details or context that may not be immediately apparent in the main text. They serve to clarify complex ideas, highlight key points, or elaborate on concepts that require further explanation. This added layer of information helps readers to better understand the content and to engage more effectively with the material, making it easier to comprehend and retain the information presented.

While other choices may appear relevant, they do not encapsulate the primary purpose of annotations. For instance, summaries offer a concise overview of the main points but do not provide the clarification that annotations do. Likewise, while visually appealing designs can enhance a document, aesthetics are not the primary function of annotations. Regarding correcting errors, that is a different aspect of document management and does not align with the function of annotations, which focus primarily on enhancing understanding through additional insights.