1. Understanding the background: Notes will provide background information about the author's views and intentions, such as the role in the research and the cited literature.
2. Pay attention to the key points: Annotations will point out the key points of the paper, including new discoveries, controversial topics and important theoretical viewpoints.
3. Understand the reviewers' opinions: Notes will provide positive and negative feedback to the paper. Positive feedback includes praising the quality of the paper, while negative feedback includes criticizing the structure, arguments and language of the paper.