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.

We explain how to insert Bullets to Text Box in an Excel spreadsheet. The Bullet feature is not available in Microsoft Excel by default; you have to enable it.

Before you add any calculations or checkboxes, you need to tell Excel that certain columns (in my case, columns D, F, and G) will output a time by changing the data type for these cells.