Click on the LR Line activate it. (It is now dark grey.) Refer to the top Figure.
Click on the LR Line to select it, place the mouse cursor on the chart, click and drag to the location. (The small squares on the sides indicate that the Line has been selected.)
To move the line, click and drag to a new location.
To remove the LR Line, click on the Line to display the squares and press Delete to remove it from the chart. Refer to the Figures below.