In this tutorial you learn how repeat any animation in After Effects easily at each marker. You first keyframe the animation and then you apply an expression that plays back those keyframes at each marker.
In this tutorial you learn how to create symmetric shapes with a super useful expression.
The Mirror iExpression can mirror any shape for you and you can even get an instant preview of the mirrored shape while you are modifying it.
In the new After Effects CC 15.1 you can now import json and jsx files to use directly in expressions. So instead of copying and pasting your expressions code again and again, you can keep your functions in one, central location now and access them easily from any expression.