(hasParent) ? parent.opacity : value;
The parent's opacity value acts as a multiplier for the child's
Seamlessly loop keyframes on a Path Property for shape layers or masks.
Control shape layer position with a Null - works like parenting, but keeps the relative position of your shape layer.
Apply to opacity property of a layer. Change name of layer to start with [1,2,3] to match the Dropdown control.
AfterEffects_Tricks
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