Follow the steps below to create a drop-down list using data validation in Excel. If you want to add a message pop up, you can click the Input Message tab and check the checkbox for “Show input ...

Learn how to change the drop-down options in Google Sheets, edit list items manually, or change the contents of a range of cells.

To add a drop-down list, you'll have to use the Data Validation function in Google Sheets. Here's how to add a drop-down list in Google Sheets, from either a list of items or a specified range.

This illustrated walk-through (with a demo worksheet) shows how easy it is to create a multi-column search solution using validation lists and conditional formatting.