Similar question previously answered by Dave McRitchie

Hi Stefan,
Formatting is not going to result in data loss.
Formatting is the presentation display.

You have to run a macro, I don't think you really want to
delete formats one at a time manually.

You will have to pick out some formats to delete in order
to open your file,  you should be able to spot 4 that you
do not need.   The limitation of format is the combination
of  font format attributes, number format, border(s) format

Cutting down on excessive formatting would help.
It is best to format an entire page, column etc, than
one cell at a time.

the following was Extracted from
 http://www.mvps.org/dmcritchie/excel/slowresp.htm#formats

Leo Heuser posted a macro 2001-05-06 in programming as a very
major revision of the macro in the eee007 article.
 http://google.com/groups?selm=OxP9cgi1AHA.1572%40tkmsftngp02

As far as important data, or any other user files.
You should always have a backup of your files.
 http://www.mvps.org/dmcritchie/excel/backup.htm
---
If you've never installed a macro before see getstarted.htm
           on my pages.
HTH,
David McRitchie, Microsoft MVP - Excel    [site changed  Nov. 2001]
My Excel Pages:  http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page:        http://www.mvps.org/dmcritchie/excel/search.htm

"Stefan Kralovic" <nusi@szm.sk> wrote ...