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 Add a Chart to Another Chart in Excel. Microsoft Excel gives you a number of tools to build, update and manipulate graphs and charts.

Type the data for the new line in the column below the heading. For every line you want to add to the chart, create a new column.

With the graph options available in Google Sheets, you can make a line, bar, column, pie, or other type of chart in just minutes.