Removing grid lines in a CairoMakie plot by setting a custom theme

I would like to set a custom theme for plots using CairoMakie to set xgridvisible and ygridvisible parameters to false for each of my plots.

I tried the following code, but it didn't work.

custom_theme = Theme(ygridvisible = false, xgridvisible = false )
set_theme!(custom_theme)

I do not want to run for every single plot and axes ax.xgridvisible = false

Theming block objects like Axis requires using the (title-case capitalized) type name as a key in the theme. This is explained in the documentation.

For your specific case, making the x- and y-grids invisible is done like this:

using CairoMakie

custom_theme = Theme(
    Axis = (
        xgridvisible = false,
        ygridvisible = false,
    ),
)

function example_plot()
    f = Figure()
    for i in 1:2, j in 1:2
        lines(f[i, j], cumsum(randn(50)))
    end
    Label(f[0, :], "A simple example plot")
    Label(f[3, :], L"Random walks $x(t_n)$")
    f
end

Without the theme:

example_plot()

With the theme applied:

with_theme(custom_theme) do
    example_plot()
end