1. Keep the picture clear and easy to read: Make sure that the cropped picture is still clearly visible without losing details and information.
2. Extract key information: When cutting, pay attention to the parts that need to be highlighted in the paper, such as data curves and labels in the chart.
3. Maintain the proportion and overall structure of the picture: If the size or proportion of the picture needs to be adjusted, attention should be paid to maintaining the consistency of its overall structure to avoid image deformation or distortion. Scanning refers to displaying pictures or graphics on the screen through the left and right movement of electron beams and radio waves.