1. First, fill in the data area and display the output from 1 to 12, as shown in the following figure.

2. Select the data, click Insert → Line Chart, and select the required chart type.

3. Draw a simplest chart.

4. Next, you usually need to adjust the icon to display the data more clearly. For example, the amplitude of the vertical axis in the above figure is too large, which leads to the curve fluctuation is not obvious. At this time, you can right-click the vertical axis and set the coordinate axis format.

5. Adjust the axis options

6. In addition, there is no specific numerical value displayed on the curve, so you can right-click the curve and select Add Data Label.

7. After setting, the curve fluctuates more obviously, and the corresponding data of each month is also displayed.

8. Right-click on the abscissa and select "Add Main Grid Line" to make the data correspond more accurately.

9. After the setting is completed, a graph reflecting the monthly output of a whole year 1- 12 will be completed.