How to Insert a Combo Box in Excel 2010. Combo boxes are a useful way of entering data into an Excel spreadsheet, combining the flexibility of a text field with the convenience of a list box.

Drop-down lists in an Excel sheet can greatly facilitate data entry. Here's a look at how to use Microsoft Excel's data validation feature to create handy lists within your worksheets.

Insert Drop Down Box in Excel Open a new Excel worksheet and type a list of entries in one column or row. For example, type in Column A, Rows 1 to 7 and leave no blank cells.

Select where you want the drop-down list to appear. Click the Data tab and select Data Validation in the Data Tools group. A Data Validation dialog box will appear.

Learn how to create a drop-down list in Excel without or with color using conditional formatting and data validation rules.

An Excel sheet with the Format As Table drop-down menu expanded. The Create Table dialog box in Excel with the My Table Has Headers checkbox checked.