When we are plotting domain (the variable is "topo") of a particular RegCM simulation, It is showing only the topography. I want to show the buffer zone of that simulation alongwith the topography. I have used nspgx=12 and nspgd=12. As there is no particular variable to plot the buffer zone, How to draw that one? I have explored a lot but nothing found. Please help me at the earliest and solve the problem.