Hiding the Legend

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

Set layout.showlegend: false to hide the legend entirely, regardless of how many traces are in the figure.

alias Plotly.{Figure, Scatter}

Figure.new()
|> Figure.add_trace(Scatter.new(x: [1, 2, 3], y: [2, 4, 3], name: "Series A", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: [1, 2, 3], y: [3, 2, 4], name: "Series B", mode: "lines"))
|> Figure.update_layout(title: "No Legend", showlegend: false)
|> Plotly.show()