using Plots
default(size = (400, 250))
A = plot(rand(10); label="A")
B = plot(rand(10); label="B")
C = plot(rand(10); label="C")
D = plot(rand(10); label="D")
plot()
plot(margin=0Plots.mm)
E = plot(framestyle=:none, margin=0Plots.mm)
F = plot(title="Plot Title", framestyle=:none, margin=0Plots.px)
G = plot(title="Plot Title", framestyle=:none, margin=0Plots.px, bottommargin=-50Plots.px)
plot(A, B, E, C; size=(600, 375), layout=(2, 2))
plot(F, A, B, C, D; size=(600, 400), layout=@layout[f{0.1h}; [a b; c d]])
plot(G, A, B, C, D; size=(600, 400), layout=@layout[f{0.05h}; [a b; c d]])