Lens

using Plots
pgfplotsx()

A lens lets you easily magnify a region of a plot. x and y coordinates refer to the to be magnified region and the via the inset keyword the subplot index and the bounding box (in relative coordinates) of the inset plot with the magnified plot can be specified. Additional attributes count for the inset plot.

begin
    plot([(0, 0), (0, 0.9), (1, 0.9), (2, 1), (3, 0.9), (80, 0)], legend = :outertopright)
    plot!([(0, 0), (0, 0.9), (2, 0.9), (3, 1), (4, 0.9), (80, 0)])
    plot!([(0, 0), (0, 0.9), (3, 0.9), (4, 1), (5, 0.9), (80, 0)])
    plot!([(0, 0), (0, 0.9), (4, 0.9), (5, 1), (6, 0.9), (80, 0)])
    lens!([1, 6], [0.9, 1.1], inset = (1, bbox(0.5, 0.0, 0.4, 0.4)))
end

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