In Microsoft Excel, to draw attention to a specific marker in a line chart, drop in a thin line, think of it as a marker.

How to Make and Add Labels on a Graph in Excel. For even the most new-to-the-program users, compiling a graph in Microsoft Excel is fairly intuitive. Excel offers a one-click option on its "Insert ...

Analyze your Excel information by creating high/low lines for your data charts, allowing you to easily view parameters of a given range. Mary Ann Richardson gives you the lowdown.