Reverse Iris wipe in After Effects
So I've come across a roadblock in my current AE prject where I need to do an iris wipe to reveal a layer underneath, but the wipe needs to go from the outside into the center, rather than inside out. There's no "reverse" button in my transition properties, and I found one post using expressions that doesn't work in my project either. What's the best or easiest way to go about what I need to do?