Dropdowns are useful features that simplify data entry and enforce data validations in spreadsheet software. Creating a dropdown list is easy. And you might have done that already in Excel. But did ...

Cascading drop-down lists—where choosing a category like "Fruit" narrows the next list to "Apple" or "Pear"—are a staple of high-level data entry in Excel. The old INDIRECT method works, but it's ...