Change the "Cell Value Is" to "Formula Is" then enter:

=C1=100

When placed in Column D, this will shade column D if C1 = 100. You may use
any formula that evaluates to TRUE or FALSE. So, something like this would
also work:

=OR(AND(C10,C1<100),A1="ABC")

This will shade the cell if C1 is greater than 0 and less than 100, or cell
A1 contains the text string "ABC".

HTH,
Elkar

"Tonto" wrote:

I can use conditional formatting to change the shading dependent on it's value.


How can I do conditional formatting based upon another cell.

e.g. I want to shed column D dependent on the value in column C.

Any suggestions ?