How to create vertical lines in line charts

When creating a line chart in Microsoft Excel, do you need to insert a vertical line to mark something on the chart?  To explain how is Excel expert, Neale Blackwood CPA.   Listen now.  Host: Neale Blackwood CPA has more than 20 years of experience as a Microsoft Excel educator. He is the author of more than 200 INTHEBLACK articles as well as a book, Advanced Excel Reporting for Management Accountants. CPA Australia publishes three podcasts, providing commentary and thought leadership across business, finance, and accounting:  With Interest INTHEBLACK Excel Tips Search for them in your podcast provider.  Email the podcast team at [email protected]  And you can read the accompanying online article of this podcast.  Other Excel articles by Neale can be read on INTHEBLACK online.