[R] global option settings for grid and lattice?

[Zepu Zhang]

Hello,

I'd like to be able to set options for grid and lattice globally, once 
for all subsequent plots, just like what ps.options() does. I walked 
through the functions of Grid and didn't find it. The following are 
related things that are available:

get.gpar()
trellis.par.set()

any ideas? thanks.