Protect and hide formulas in Microsoft Excel
Protect and hide formulas
Select cell(s) whose formulas you want to hide using Format menu.
Click Cells and then click the Protection tab.
Click Hidden and click OK.
Click Tools menu, Protection, Protect Sheet.
Type password and click OK.
Reenter password to confirm, then click OK.
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The step to remove protection:
Click Tools menu, Protection, Unprotect Sheet.
Type password and click OK.