The method is as follows: If it is unimodal data, you can find two data, MAX and Min, from the original data, and then find the corresponding point in the graph (you can enlarge the desired area by changing the value of the coordinate axis to help you find the required point). On the data point, double-click the peak point to pop up the data point format dialog box, and then you can edit the style of the point. You can ask me if you don't understand anything.