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.

How to Change the Intervals on an X-Axis in Excel. The X-axis, which is the horizontal axis, on most Excel charts does not use numeric intervals like the vertical Y-axis does.

Use Microsoft Excel's TODAY() function in simple expressions to highlight the current date and past and future dates.

Excel for the web now supports conditional formatting, and the interface is easier to use than the desktop edition. Susan Harkins shows you how to use it.

It's easy to change the date format in Microsoft Excel. You just need to use the "Date" drop-down menu, which gives you plenty of options.