Below are the steps to protect an Excellentable sheet.

  1. Select the sheet you want to protect.

  2. Right click on the Sheet  and select "Protect" to protect the sheet.

  3. You should now see that the sheet is protected.

  4. If you click on any cell of the sheet, a note is displayed saying "You cannot edit or delete a protected sheet" as below.

See Also: How to Unprotect Excellentable Sheet