There is the simple choker and the matte choker but what will probably help first is in your Keylight go to view screen matte. then go down tgo screen matte and play with the clip black and white settings. these are the finer controls you have been looking for
in the scene setup each object as an alignment…middle bottom top…etc..if these options are not specific enough there is also and anchor point coordinates section..in the scene setup
if you have ever tried to draw or write a cartoon show you quickly realize how limited your own internal library is. because we have never done it before..so look around at others
CC GLASS is basically the same as the displacement map except for it also has some shine and reflective settings on top..And the wave generator..kinda uses it