Limit lines command

Allows you to draw up to four visual reference lines on the XY plot. These reference lines can be used for marking a limit or reference line so the XY plot can be monitored for excursions within or beyond this limit. 

When this command is selected, the Limit Lines dialog box is displayed. In this dialog box you specify the beginning and ending XY coordinates of each reference line. When the lines have been set, close the dialog box by choosing the OK command button. The lines will appear on the display when the dialog box is closed. You may want to adjust the color of the limit lines for best contrast with your current background and line color settings. Color settings are changed with commands on the View menu.

To remove the limit lines, set the beginning and end point coordinates equal to each other.