1) Select the button under the path selection tool, and then press and hold the left mouse button to select the straight line tool, as shown in the figure.

2) Then press Ctrl+r to bring up the ruler, as shown in the figure.

3) Hold down and drag with the left mouse button within the scale, and draw two vertical lines on the canvas, as shown in the figure.

4) Then use the line tool to make several axes, as shown in the figure (make sure your new canvas is unlocked).

5) Then select the path interface, brush tool and stroke.

Let's do it. 0

As for the unit length, you can look at the ruler above and decide for yourself, and then draw a stroke ~