{ "matrix":[2,0], "label": "Tab", "x": 0, "y": 3.5, "w": 1.5 }, { "matrix":[2,1], "label": "Q", "x": 1.5, "y": 3.5 }, { "matrix":[2,2], "label": "W", "x": 2.5, "y": 3.5 }, { "matrix":[2,3], "label": "E", "x": 3.5, "y": 3.5 }...