In this example, a sample bit of the line style used for each data
set is placed, using PlotS, in a vacant part of the graph. Then,
next to it, the data set name is placed using XYOutS.
x=findgen(10) y=x*2 z=y-3
plot, x, y oplot, x,z, linestyle=1 plots, [0.8,2], [18.5,18.5] plots, [0.8,2], [17,17], $ linestyle=1 xyouts, 2.3, 18.5, 'Data Set y' xyouts, 2.3, 17, 'Data Set z'
