Conditional Formatting various colums at once

[Compare Values]

Hi, I would like to add a Conditional Formatting to various colums at once.
Example if A1>B1 make cells C1, D1 and F1 red,
Please advise

 

[Bob Phillips]

Select C1, D1 and F1 and use a formula of

=$A1>$B1

 

[Mary]

Thank you Bob but it did not work. I selected C, d and F at once an I typed
the below formula but nothing happens

 

[Erin Searfoss]

Are you typing the =$A1>$B1 formula in the Conditional Formatting dialog box
with Condition 1 set to Formula Is?