How to Have Three Secondary Axes on Excel 2007. Excel 2007's secondary axis feature enables you to view two different data series with two distinct scales, all on the same chart. Use this feature ...

How Excel Charts Work A chart has an x-axis range and a y-axis range to show the correlation between two different data sets. The x-axis is the horizontal category line.

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.