Observable-Community

the _data_ passed to the image mark is *logo*, which has a length of logo.length = 175

so the mark piled up 175 images on top of one another

replace it with {length: 1} (or equivalently,  [null])

```    Plot.image({length: 1}, {
      src: [logo],
      frameAnchor: "top-right",
      href: ["<https://github.com/zachbogart/huh-data>"],
      target: "_blank",
      width: 150,
      dx: -80
    }),```

Excellent catch, thanks for the clarification. This correction should also be applied to the <https://observablehq.com/@observablehq/custom-plot-themes#cell-459|custom plot theme notebook>. ◆