[seema]

To protect a workbook

• From the Review tab, in the Changes group, click Protect Workbook icon, and then click Protect Structure and Windows.
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• From the Protect Structure and Windows dialog box displayed, you have two options:
  Structure - protect your workbook from the moving, addition, and deletion of worksheets.
  Windows - protect your workbook from changes in the size and position of windows.
  Password (optional): require a password to remove these protections.
• Click OK.