I have two duplicate images in my composition.
I want them both to rotate at exactly the same speed, etc.
But I want the second one to rotate in reverse.
In the transform rotation property is there a way to have a negative rotation?
Or must it be done using an expression (I have never used expressions, so I would need some help there), as per this forum comment from Creative Cow:" http://forums.creativecow.net/archivethread/2/735507
Nobody forces you to use expressions, but if you want, it's as simply as typing value*-1 to invert anything. And yes, AE will happily accept negative rotation values as well.