You would have to make it: When CheckBox 3 is checked, CheckBox 4 is Unchecked. When CheckBox 4 is checked, CheckBox 3 is unchecked. I think that would work. > Date: Fri, 1 Jul 2011 10:22:08 -0600From: forums@adobe.comTo: jeanetteeichhorn@hotmail.comSubject: Check box - When yes is checked no will ...