Change tick positions

You can customize the position of the ticks on the Smith chart using the xvals and rvals keywords. These control the placement of the reactance arcs (xvals) and resistance circles (rvals) respectively.

using CairoMakie
using SmithChart

f = Figure()
sc = SmithAxis(f[1,1], xvals = [0.1, 0.3, 0.7, 1.0, 2.0, 4.0, 10.0], rvals = [0.2, 0.4, 0.6, 1.0, 2.5, 7.0, 15.0])
f