3. Step 1: After making sure Excel 2016 worksheet is finished editing, turn to File
> Info > Protect Workbook, where you can choose an option Encrypt with
Password to set open password to this excel workbook, protecting all of
worksheets in it.
4. Step 2: Type a powerful password in following Encrypt
Document dialog, and click OK
5. Step 3: Confirm the password by repeat the
same password again. That is it.
Last, you would see the protected workbook
7. Step 1: Navigate to File > Info > Protect Workbook >
Protect Current Sheet.
8. Step 2:In following Protect Sheet dialog, check Protect worksheet and contents of locked cells.
Set a password to protect/unprotect this worksheet, and under Allow all users of this worksheet
to option, choose what you want to allow users to do. Click OK to protect this worksheet.
9. Step 3: Type password again to confirm worksheet
password protection.
14. Step 1: Choose File > Info, next to Protect Workbook, you can see whether your excel worksheet
is restrict editing. If you see there is a message "One or more sheets in this workbook have been
locked to prevent unwanted changes to the data", click Unprotect button after it. Type modify
password you know in Unprotect Sheet dialog, and click OK.