PLA TrackBasic Properties
This track lets you animate the points of polygon objects and splines. Primitives and spline primitives must be made editable using the Make Editable command before you can use them with PLA (Point Level Animation).
Use a key to record the positions of all points belonging to the selected object. This method enables you to animate changes in the shape of objects or splines. The advantage of the PLA track over the similar Morph track is that with PLA you don’t have to create target objects.