Margins between plots in grid.arrange

Question

I dont seem to be able to find a solution as to how to increase the space between two plots with grid.arrange. I find no clue as to how to proceed. I dont want to change the

Answer 1

the standard way is to change the plot margins,

pl = replicate(3, ggplot(), FALSE)
grid.arrange(grobs = pl)  # default settings

margin = theme(plot.margin = unit(c(2,2,2,2), "cm"))
grid.arrange(grobs = lapply(pl, "+", margin))