* Key Shape: define a polygon by providing a list of points, in Key Units.
* **Important**: These are relative to the top-left of the key, not absolute.
* Example ISO Enter: `[ [0,0], [1.5,0], [1.5,2], [0.25,2], [0.25,1], [0,1], [0,0] ]`
* Key Shape: define a polygon by providing a list of points, in Key Units.
* **Important**: These are relative to the top-left of the key, not absolute.
* Example ISO Enter: `[ [0,0], [1.5,0], [1.5,2], [0.25,2], [0.25,1], [0,1], [0,0] ]`