How to add a vertical line to a bar chart to indicate comparison.

[Berean_50]

I want to achieve the effect of adding a vertical line to indicate comparison, say a benchmark or previous year? 
Thank you

[Berean_50 · Accepted solution]

Sorry for the question which has already been answered here:

https://community.powerbi.com/t5/Desktop/Simply-want-a-vertical-reference-line-on-a-bar-chart/m-p/13...