creating color pdf's

all,

 i am trying to create a PDF file from printing where a certain level is a color (red) and all other levels print black (for a "asbuilt" project) i have a existing  plot table to specify this & for whatever reason it is not working now :( would someone care to share maybe what they do to create a plotted PDF file where everything prints b/w except a particular level???

 

thanks!!

c-j

p.s. i know this might be a little vague.. i am fairly new to microstation & not sure how to "describe" my situation & desired result LOL!