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Feature Request: select2d, lasso2d on Heatmaps

Currently you can’t add select2d or lasso2d to the modebar on heatmaps: The behavior is working, and the icons are present so they can be added in manually:, but this approach isn’t available if you’re working with dash or the python API.

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In the meantime, you try adding an invisible scatter trace to your graph e.g:

  x: [/* */],
  y: [/* */],
  opacity: 0
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