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 can easily hide and unhide columns in Excel by individually revealing hidden columns or using the "Format" option to ...