Touch Controller Tooltip Design

I'm starting to design the controller tutorial for my app, to show the player what all the different Touch Controller buttons/triggers/sticks do in my app.

I'm surprised not to see any Unity examples or best practices of this in any of the Samples or Tutorials out there as every app needs to do this. If you've come across any good examples or have created one, please share.  

For example, Oculus Medium uses a range of interesting techniques (2D & 3D), so it would be wonderful to see how something like that could be implemented in Unity.