hlines! and vlines!
hlines!(ax::Axis, ys; xmin = 0.0, xmax = 1.0, attrs...)              
                Create horizontal lines across
                
                  ax
                
                at
                
                  ys
                
                in data coordinates and
                
                  xmin
                
                to
                
                  xmax
                
                in axis coordinates (0 to 1). All three of these can have single or multiple values because they are broadcast to calculate the final line segments.
              
vlines!(ax::Axis, xs; ymin = 0.0, ymax = 1.0, attrs...)              
                Create vertical lines across
                
                  ax
                
                at
                
                  xs
                
                in data coordinates and
                
                  ymin
                
                to
                
                  ymax
                
                in axis coordinates (0 to 1). All three of these can have single or multiple values because they are broadcast to calculate the final line segments.
              
            These functions are not plot types / recipes and only work with
            
              Axis
            
            .
          
using CairoMakie
f = Figure()
ax1 = Axis(f[1, 1], title = "vlines")
lines!(ax1, 0..4pi, sin)
vlines!(ax1, [pi, 2pi, 3pi], color = :red)
ax2 = Axis(f[1, 2], title = "hlines")
hlines!(ax2, [1, 2, 3, 4], xmax = [0.25, 0.5, 0.75, 1], color = :blue)
f          These docs were autogenerated using Makie: v0.15.3, GLMakie: v0.4.7, CairoMakie: v0.6.6, WGLMakie: v0.4.7
