To enable workbook protection for the current document, proceed as follows:
| 1. | Choose the ribbon command Review | group Protection | Workbook protection  . |
| 2. | If desired, you can now enter a password that must be entered by the user to disable workbook protection. |
| If you do not want to assign a password, simply leave the input field blank. |
Workbook protection is now enabled; it is no longer possible to insert, delete, show/hide worksheets, etc.
Furthermore, most of the options in the dialog box of the command File | Properties are no longer available.