Select the window you don't want.
hit ctrl-w
don't forget to save your workbook.

RED wrote:

I sometimes get two of the same file.whatever i do to one file is done to the
other.The second file has the same name then a ":2".the original file gets a
":1".I can't seem to get rid of the mirror image.When i open it ,there is
only the one file,but once opened and you hit the window select pull down
menue it shows two files.

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Dave Peterson