Just being picky about semantics, but this isn't "a second instance of the
same file". Two windows means two different views of the same data, not two
copies of the data in memory.

On 2 Mar 2005 08:16:28 -0800, "Dave O" wrote:

It sounds like you may have inadvertently opened a second instance of
the same file. You can do this (on purpose) by clicking Window New.
If you save the file in this format, it reopens with both instances
showing.

Resolve it by clicking the X in the upper right corner of the :2
instance. Save the file, and from then on you'll see only one instance.