Dear R experts, I am trying to plot some figures using ggplot2. But, I do not know how to set up the plot size. (par(fig=)) seems not work in ggplot2 environment. Also, I do not know how to use Arial fonts in the plot. I have tried to load the package "extrafont", but I can not install this package. I don't know the reason. Can you help me to resolve these questions? thank you very much. Yichun [[alternative HTML version deleted]]