Jurg "& T-Bear: thanks, guys.
With hideplot 'on', I'm plotting with control over lineweight by using a color dependent approach, as you mentioned. Only remaining issue is:
the black & white HP printer I use is grayscaling the colored lines; I'd prefer that the lines were printed 'black' instead. have adjusted parameters in the plot style table editor to achieve the line value I'm after, but no luck yet. almost there, still diggin'.
Curious- T-Bear, are you plotting in color, grayscale, or 100% value black?