Return a transform to be used to map coordinates in a morph above me into my childrens coordinates, or vice-versa. This is used to support scrolling, scaling, and/or rotation. This default implementation just returns my owner's transform or the identity transform if my owner is nil.
Note: This method cannot be used to map into the receiver's coordinate system!
Return the rotation center of the receiver. The rotation center defines the relative offset inside the receiver's bounds for locating the reference position.
Set the new rotation center of the receiver. The rotation center defines the relative offset inside the receiver's bounds for locating the reference position.