After clicking the small triangle icon, the following options will appear. Select the Line graphic in the line.
Then you can use the mouse to draw a straight line under "Personal Information", which is the inserted column. Tip: Hold down the Ctrl key when drawing a horizontal line to ensure that the drawn line is straight and not bent.
After clicking the horizontal line, select the last Format Shape from the right mouse button menu.
Then you can set the color, thickness, length and other attributes of the line (horizontal line) here.
See:/archives/1001899.html for details.