To setup a threshold line on a chart:
In the view, right-click a chart, then select to open the Properties page.
In the left pane, click to display the Thresholds property page:
Click .
Specify a value in the field.
The line is drawn at this value on the Y‑axis.
Click the colored rectangle, then select a color from the palette.
Click .
A horizontal line in the selected color displays across the chart along the specified threshold value on the Y‑axis.
To select a threshold:
In the chart’s Thresholds property page, click the drop-down list, then select a threshold.
To expand the width of the threshold band:
In the chart’s Thresholds property page, select the check box.
Specify a second value in the number box to draw the threshold band between the values specified in the To and Threshold Value number boxes.
To delete a threshold:
In the chart’s Thresholds property page, select the desired threshold in the Threshold drop-down list, then click .
The threshold setting disappears from the drop-down list.