You can unprotect some cells in Excel 2007 to let you expand groups on protected worksheets.

Safeguard your Excel worksheets from accidentally deleting formulas or data sets by locking important cells, while leaving the rest of the worksheet editable.

Learn how to unprotect Excel sheets or workbooks without a password using this simple step-by-step guide. No software required!

To lock your cells in Microsoft Excel, you just need to head into the program's "Protection" tab. Locking a cell in Excel will make it so viewers can't change the data inside of that cell, which ...