Activity › Forums › Adobe After Effects › Only One Checkbox Selected Expression Adobe After Effects Only One Checkbox Selected Expression Posted by Nathaniel Costa on August 6, 2015 at 10:00 pm I have three checkboxes on a layer. Only one box should be checked at a time. I wrote an expression to uncheck the other two boxes when one is checked. It works until the playhead is moved then it reverts to the original values of the checkboxes. Can anyone help me figure this out? Daniel Waldron replied 10 years, 12 months ago 2 Members · 1 Reply 1 Reply Daniel Waldron August 10, 2015 at 3:23 pm A lot of the expressions experts seem to roam the Expressions forum more than other ones. Try posting there. Reply to this Discussion! Login or Sign Up Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me Reply to this Discussion! Login or Sign Up