Hello, I'm using SolidWorks 2016 version. I wanted to plot a drawing created from a SW part file in which I need to thicken some lines selectively. The lines that I need to thicken are inside the solid, whose transparency I have increased for better visibility of these thickened lines. Whenever I use the line thickness option and increase the thickness of the lines (of these interior solid), they aren't visible when I generate a .pdf. Can someone help me how can I sort the issue by using Line Thickness or Layer Properties function.

I have attached the figure in the attachments section. I basically need to increase the thickness of the lines comprising the hexagonal prism inside the cubical solid only keeping the other lines of the same thickness.

When I try to do the same using Line thickness property and save the drawing as a pdf/ png/ jpeg; I can't see the lines in the interior region, though I'm able to thicken the lines of on the exterior surface, say for ex, the outside edge of the cube.

Thank You in advance.