I am trying to use a worksheet with a PDF as a trace reference from a consultant underneath model. I can see the trace reference when zoomed out, but if I zoom in to work in an area of my project, the trace line work disappears. I can see a shaded color that indicates a PDF trace is there, but it is not showing the line work from the PDF unless I am zoomed out. But that is too far to work with any accuracy. Any ideas?