Outer legend positions

using Plots
gaston()

Horizontal or vertical legends, at different locations.

legs = (:topleft, :top, :topright, :left, nothing, :right, :bottomleft, :bottom, :bottomright)
leg_plots(; kw...) = begin
        map((leg->begin
                    plot([0:1, reverse(0:1)]; marker = :circle, ticks = :none, leg_title = leg, leg = if leg isa Symbol
                                Symbol(:outer, leg)
                            else
                                :none
                            end, kw...)
                end), legs)
    end
(w, h) = PlotsBase._plot_defaults[:size]
with(scalefonts = 0.5, size = (2w, 2h)) do
    plot(leg_plots()..., leg_plots(legend_column = -1)...; layout = (6, 3))
end

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