To highlight lines in an existing Excel document, click the "File" tab. Click "Open," browse to the spreadsheet and double-click it. Otherwise, Excel opens a new spreadsheet for you to use.

How to Highlight Intervals in Graphs in Excel. The interval between the gridlines in an Excel chart is typically blank, but you can highlight the intervals using an alternating pattern by changing ...

By using the Highlight Cells Rules, you can highlight duplicate cells in your Excel worksheet to avoid confusion and mistakes.

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.

Sparklines are in-cell charts in Microsoft Excel that are easy to create and extremely helpful, but they can be more insightful with just a few specific settings.