R Under development (unstable) (2023-10-23 r85389 ucrt) -- "Unsuffered Consequences"
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> library(lattice)
> 
> pdf("fontsize.pdf", pointsize = 5)
> 
> splom(iris, sub = "pdf:fontsize = 5")
> 
> trellis.par.set(grid.pars = list(fontsize = 5))
> splom(iris, sub = "grid.pars:fontsize = 5")
> 
> trellis.par.set(grid.pars = list(fontsize = 10))
> splom(iris, sub = "grid.pars:fontsize = 10")
> 
> trellis.par.set(fontsize = list(text = 15))
> splom(iris, sub = "grid.pars:fontsize = 15")
> 
> dev.off()
null device 
          1 
> 
> 
> 
> proc.time()
   user  system elapsed 
   0.65    0.06    0.70