draw lines in graph parallel to y axis

[Grugh_Mike]

I want to draw lines in a graph programatically.

In the vi attached, i have displayed a histogram chart.

I need to plot two lines parallel to y axis at different x axis locations to show the bounds/ range of values.

kindly help me in this.

Thank you in advance.

[Ljubo · Accepted solution]

Two cursors maybe?

[altenbach]

Or just use a second plot with a special style.

[Grugh_Mike]

thank you all very much