Microsoft Excel's Data Validation tool lets you add a drop-down list to a cell based on existing data in a column. However, how this works depends on whether the source data is part of a formatted ...

What are Excel add-ins? Excel add-ins (also known as Excel add-ons) are applications that extend the usability of the Microsoft Excel spreadsheet software. These tools will help you find Excel ...

Many of them are backward- and forward-compatible, but check the system requirements before you download anything. Note that newer isn’t always better: Many of the ...