Protecting cells in the sheet means that the contents of cells cannot be changed and/or formulas can be hidden from view.




1. Press Ctrl+1 and select the Protection tab in the Format Cells dialog box.
2. Select the Locked checkbox and click OK.


Select Review - Protect Sheet (in Changes Group)
Or
1. Select the sheet tab, right click and select Protect Sheet.
2. Enter a password and click OK.