In earlier versions, the actual
moving track of a key dot is always a straight line. Just choose the
View/Morph Track menu, you'll see the yellow lines as below.
Beginning with version 4.0, you can use a real curve as morph
track instead of previous straight line. You'll find that you can easily create
very different and amazing morphs with this new feature. Note, now you can only
set one curve for all the key dots, we'll try to add a more advanced feature in
the future version so that you can set different curves for each key dot.
Here are some examples when different curves applied.
