Basic Example — Horizontal Legend

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

Section

Set legend.orientation: "h" to display the legend horizontally below (or above) the plot instead of vertically on the right. Use legend.x and legend.y to reposition it. Values are in paper coordinates (0–1).

alias Plotly.{Figure, Scatter}

x = Enum.to_list(1..5)

Figure.new()
|> Figure.add_trace(Scatter.new(x: x, y: [1, 2, 3, 4, 5], name: "Series A", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: x, y: [2, 4, 1, 3, 5], name: "Series B", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: x, y: [5, 1, 4, 2, 3], name: "Series C", mode: "lines"))
|> Figure.update_layout(
  title: "Horizontal Legend",
  legend: %{orientation: "h"}
)
|> Plotly.show()

Figure.new()
|> Figure.add_trace(Scatter.new(x: x, y: [1, 2, 3, 4, 5], name: "Series A", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: x, y: [2, 4, 1, 3, 5], name: "Series B", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: x, y: [5, 1, 4, 2, 3], name: "Series C", mode: "lines"))
|> Figure.update_layout(
  title: "Horizontal Legend Positioned Above Plot",
  legend: %{orientation: "h", x: 0.5, xanchor: "center", y: 1.1, yanchor: "bottom"}
)
|> Plotly.show()