I like this to close windows I don't want.

Select the window I don't want.
hit ctrl-w
save the workbook the way I like (so I don't have to do it again)

KGAR wrote:

I received an Excel spreadsheet that produces two separate spreadsheets when
I open it. They have the same names except that one is .xls:1 and the other
.xls:2 and I have not been able to find what this signifies.

--

Dave Peterson