1, picture title or description: clearly indicate the source of the picture in the title or description at the bottom or right of the picture. You can use concise and clear text description, including data source, experimental equipment, literature citation and other information, so that readers can understand the source and background information of the picture.

2. Literature citation: If published pictures are used in the paper, especially pictures from other documents or sources, the citation information of the literature, including author, article title, journal name, year and page number, should be indicated in the picture title or description. Only in this way can we accurately quote other people's works and respect their knowledge contribution.

3. Self-created pictures: If you design and draw the pictures in your paper, you can indicate in the title or description of the pictures that you created them yourself or for the author to show your ownership of the pictures.

4. Source of software and tools: If you use specific software or tools to generate or process the pictures in the paper, you can indicate the name and version of the software or tools in the picture description so that readers can understand the specific tools you use.

5. Source and authority of data: If data from other research teams or institutions are used, the source of the data should be indicated in the picture description, and the corresponding authority or authorization for using the data should be ensured.