Hi,
Your title is different than the message - in one you say worksheet, in the
other you say workbooks.
Duke has given you the answer for Workbooks. Here is the answer for
worksheets.
1. Choose Window, New Window
2. Choose Window, Arrange, and pick Cascade or whatever
3. In one of the two windows click a different tab
You will be looking at 2 differenct sheets in the same workbook. Or if you
want the same sheet twice.