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.

For example, you could show line graphs for temperature and humidity on top of each other. For this purpose, Excel lets you add a series of data to a chart and plot it on a second y-axis.

When the relationship between the charted entities is less important than the individual entities, try using these two chart techniques to highlight important details in Microsoft Excel.