plot world.prm|cities.prm|ellipse5000.prmto
plot world.prm|{LT=WMS,URL="..."}|cities.prm|ellipse5000.prm
(You will need to insert the appropriate URL in the space provided, see
PLOT explain file for sample URLs.)
PLOT window click MMB-->Layers-->WMS and then select
the maps and imagery you want to see.
PLOT in the background and configure it the way
you like, you can then get the configuration back from it using:
nM> say "^{reg.plot.layers.wms.config}"