try the countif function in your conditional formating

"Lucas" wrote:

Hello all,

I have a row of 9 cells, which I want to fill with the numbers 1 to 9. Each
time I put a number in a cell I want excel to compare all 9 cells in the row.
If I type in a number that is already in one of the other 8 cells I want it
to light up in red. I tried using "conditional formatting" but I can only
compare 2 cells at a time. Does anybody have an idea?

Thanks in advance,
Lucas