I have the only work station of many in our office with the following problem in AutoCAD 2009:  I can see no Plot Preview display in Plot dialogue box for OCE pen plotter pc3 files, though I can for Adobe PDF and HP smaller format plotters, whether trying to plot from Paper Space of Model Space, with one exception:  in Paper Space, if I have a viewport display of a PDF image in model space, that image will show up in Plot Preview, but nothing else (no xrefs through viewports, and nothing in Paper Space).  However, I can send the plot "blind" (without first viewing) to the plotter, and it will plot properly.  Anyone know how to "turn on" the preview display?