Text or caption in specific position on a layer

[g1eng]

Request

I'd like to embed specific text in a layer. Supply a mechanism to display figure caption or any text on a layer.

Proposal

Add captions parameter in FigConfig object:

{
  "captions": [
    {
      "text": "Some Great Series of Data",
      "fontSize": 15,
      "position": [20,35]
    }
  ]
}