It is definitely important to draw a line with points, but is it necessary to make sure that the measured point data is a coordinate value (that is, an absolute coordinate value relative to the origin)? If so, you have to draw points by absolute point method. The method is that when the pl command needs a given point, enter the coordinate values of X and Y on the command line, separated by commas. For example, for points with x=5000 and y=3000, type 5000,3000 in the command line, and then press enter to get a line segment to the point. Draw a point like this. You are obviously in the state of "dynamic input" now, and you can't enter coordinates on the command line. The switching method is to turn off the "Dynamic Input" button at the bottom, as shown in the figure below. The button with a small rectangular pattern in the lower right corner of the small cross is.

If the coordinates given to you are indeed relative coordinates, then it is a good choice to enter them under "dynamic input". Each time, the incremental values of x and y are calculated from the current point (that is, the relative displacement coordinates). When you need a point, the first coordinate you need is the X coordinate, and then it ends with a comma, so you will enter the Y coordinate. Given the Y coordinate, press enter to draw a line segment to this point.