Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.

Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has ...

Susan Harkins shows you a quick method for removing validation rules for multiple ranges in Excel, at the same time.

Data validation drop-down lists in Excel adopt the same order as the source. In this example, to order the nations alphabetically, you would need to sort the source data by column B.

An easy way to add error messages in Excel is using Data Validation. Create error messages in Excel for creating validations and restrictions in data tools.

I only started noticing this problem for a little over a month. I built a taskpane add-in for Excel using office.js for one of our departments at work. For almost 2 years it has been working perfectly ...