Enable Chart Tool options by clicking anywhere within an Excel 2007 or 2010 chart whose information you want to modify. Click Design on the main menu, then Layout and finally, select Axis Title or ...

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.

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.