Excel automatically distributes these points along a uniform X axis. To add more data to the Y axis in a line chart, add additional numbers in cells below your existing data.

How to Add Zoom & Scroll to an Excel Chart. Excel charts containing large amounts of data prevent readers for easily reading small segments. For example, if a chart tracks your company's daily ...

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.