How to create a drop-down list in Excel to manage data and prevent mistakes

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 ...
How-To Geek on MSN

Everything You Need to Know About Data Validation in Microsoft Excel

To apply data validation rules to a selected cell or range, head to the "Data" tab on the ribbon, and click the top half of ...

How to lock cells in Microsoft Excel, so you need a password to change or erase data

You can lock cells in Excel by heading into the program's "Protection" tab. There, you can set a password, and protect your ...
How-To Geek on MSN

Everything You Need to Know About Array Constants in Excel

Array constants can only contain text in double quotes, plain numbers (no currency symbols or percent signs), or Boolean values (TRUE and FALSE), separated by the comma and semicolon delimiters. They ...