I am having issues with 3-D drawings/Layouts using version 2007. I try plotting in monochrome and dimensions plot correctly (in paper space), but the lines from the viewports do not. The lines are all dotted and very light in appearance. Even in the preview plot, the lines either show lightly or for hidden lines (green in color) show as green. Any thoughts as what is causing this issue. I am using the default setting for layers (same thing we have been doing for the last 9 years without issues)..... Thanks.