Mark It As Final!
Enough!
Stick a fork into it; this turkey is done. Here are the steps to
Mark As Final. This action changes the spreadsheet to Read Only.
Try it: Mark As Final
Go to
Office ->Prepare.
Select:
Mark As Final.

You should be notified that the workbook will be
marked and saved. When you say, OK, the workbook with be saved as
Read Only. In the Document Properties the status was
changed to Final.
What Do You See? In the bottom left corner of
the spreadsheet is a small red and white icon.