Auto outline

Hi Angela,
Thank you for your post and welcome to the forum;
This is a feature that allows you to outline your data. This simply means that Excel analyses your data and assigns different rows to different "levels." These levels can then be selectively hidden or displayed, depending on your needs. An outline is handy for getting a quick understanding of large amounts of data.
1. Insert automatic subtotals. Select a cell in a data lis, display the Data tab, then click on Subtotal in the Outline group.
2. Let Excel automatically outline your data list. Select the list that you want outlined, as you are using Excel 2007, display the Data tab of the ribbon, click Group from the Outline group, then click Auto Outline.
3. Manually outline your data list. Select the data you consider to be detail information, then choose to display the Data tab of the ribbon, click Group from the Outline group, then click Group again. Repeat the process for all other detail information in the data list.
Once your data is outlined, outline symbols appear at the left side of the worksheet. You can display different levels of data by using the mouse to click on the various symbols.
I hope that has made it a bit clearer, regards Pete