Adding a constant line

A constant line is a value-specified line on the plot, behind the data points, to indicate a value as a limit or other special meaning. Constant lines can be customized with color, line style, thickness, and a font and color specified label.

To add a constant line:

  1. On the Chart tab, in the Zones group, click Zones.
  2. Click Add.
  3. In the Name box, specify a name for the constant line.
  4. Click OK.
  5. From the Type list, select Constant Line.
  6. In the Value box, specify a value for the constant line.
  7. From the Color list, select a color for the constant line.
  8. From the Style list, select a line style. You can choose a solid line or variations of dots and dashes.
  9. In the Width box, specify a width for the constant line. Specify 1 for the thinnest line, up to 20 for the thickest line.
  10. Select the Label on line check box if you want the name of the constant line to appear above the line.
  11. Optionally, specify a font type, size and other attributes.
  12. Optionally, from the Color list, select a color for the label text.
  13. Click OK.
  14. Click Save Changes.