You can easily create a drop-down list in Excel to limit the values that can be entered in a column. Here's how to set one up ...

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 ...

You may need to add cells in Google Sheets if your spreadsheet needs to contain more information than it currently has room for.