If Excel is not highlighting cells in the formula, enable 'Allow editing directly in cells' and 'Enable fill handle and cell drag-and-drop' in Excel options.

We explain how to fix the issue when Excel is not auto-calculating formulas. Excel is an advanced tool when calculating formulas for statistics.

Protecting cells in your Microsoft Office Excel 2010 spreadsheet is a good idea because it enables other people to view the spreadsheet but prevents them from modifying your data and formulas.