Constant Lines

A constant line is a straight line that extends over the entire chart and indicates an axis value. Constant lines are always perpendicular to their axis.

BootstrapChart_ConstantLine

Use an axis's BootstrapChartAxisSettings.ConstantLineCollection collection property of to configure its constant lines. A BootstrapChartConstantLine class object represents each constant line the collection. Use its properties to configure the constant line's value, label, and presentation. The BootstrapChartConstantLine.Value property should be set for a constant line to appear on the chart.