contour_label-font-size.json

{
  "data": [
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 4}},
      "showscale": false
    },
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 8}},
      "showscale": false,
      "xaxis": "x2",
      "yaxis": "y2"
    },
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 12}},
      "showscale": false,
      "xaxis": "x3",
      "yaxis": "y3"
    },
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 16}},
      "showscale": false,
      "xaxis": "x4",
      "yaxis": "y4"
    },
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 20}},
      "showscale": false,
      "xaxis": "x5",
      "yaxis": "y5"
    },
    {
      "type": "contour",
      "x": [1, 2, 3, 4],
      "y": [1, 2, 3, 4],
      "z": [
        [-1, -2, -4, -8],
        [-2, -4, -8, -1],
        [-4, -8, -1, -2],
        [-8, -1, -2, -4]
      ],
      "contours": {"showlabels": true, "labelfont": {"size": 24}},
      "showscale": false,
      "xaxis": "x6",
      "yaxis": "y6"
    }
  ],
  "layout": {
    "grid": {"rows": 3, "columns": 2, "pattern": "independent"},

    "template": {
      "data": {
        "contour": [{
          "hoverlabel": {"namelength": -1}
        }]
      }
    },

    "width": 800,
    "height": 1200
  }
}