Excel Hide/Unhide Rows/Columns

Hi,

I have attached a file containing a feature I would like to use but do not know what it is called or where to find it. By clicking a + button users can unhide rows or columns. Click the - button and users can hide those same rows or columns?

Excel Feature.xls

Thanks in Advance,

Jordan

Data -> Group and Outline

I did not know this could be done either...thanks for the post and the answer!

Thank!!!