Toolsoptions, Edit tab, check Extend data range formats and formulas. Look
in HELP for details

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Kind regards,

Niek Otten

Microsoft MVP - Excel

"nc" wrote in message
...
A B
1 Test =LEN(A1)
2

Is there an option setting within Excel 2003 that will automatically write
the formula in cell B2 (derived from B1) when I input something in A2.