here's a link that gives the excel 2007 specs. saving in xls format allows
users of older version to open the file, but you lose the features and
limits added to 2007.

http://office.microsoft.com/en-us/ex...738491033.aspx

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Gary Keramidas
Excel 2003


"Denny Dunn" wrote in message
...
I have a coworker that refuses to save excel in the new format (xlsx) I
explained that this format will give her more features than available with
the 2003 (xls) format. Unfortunately I did not know the added features
that
saving in xlsx would give. Is there a document out there that gives the
added features in xlsx format?
--
Denny Dunn
Laser Pros International
Wisconsin - USA