Вы можете использовать следующий код
library(sjPlot)
library(ggplot2)
mod <- glm(mpg ~ wt, data = mtcars)
set_theme(base = theme_classic(), #To remove the background color and the grids
theme.font = 'serif', #To change the font type
axis.title.size = 2.0, #To change axis title size
axis.textsize.x = 1.5, #To change x axis text size
axis.textsize.y = 1.5) #To change y axis text size
plot_model(mod, type="pred", show.p = TRUE, axis.title = "Ancho (m)", title = "")