Go to the File Menu, and click Save As. 2. From the Tools menu, click Options. 1  If you want users to enter a password before they can view the workbook, type a password in the Password to open box, and then click OK.o to the File Menu, and click Save As. 2. From the Tools menu, click Options. 1  If you want users to enter a password before they can view the workbook, type a password in the Password to open box, and then click OK.