Hello Ronald,
There are ways to apply thickness to your lines, assuming you applied the pen thicknesses in the layer manager (command LA), and that each property entity corresponds to "per layer" would be fine. (See Image Properties)
The detail is that by visualization and comfort when working, you can activate or deactivate to see the thickness of lines in the model, without affecting the allocation you already made, LWDISPLAY command. (See bottom icon Numbered 1 in image)
Now, the viewports ( in layout tab) you should see them represented also and it will be closer to the reality. You should note that Although you can apply small thicknesses, you will not have a preview of those smaller than .30, without this meaning that they are not assigned. (See numbered 3 in image)
It is, at the moment and in the plotting box, where you can configure .ctb and others.
I give you an example of what I say with any file, and to show you the difference between "line thickness" (numbered 3 in image) and "scale in line type" (see numbered 4), this goes hand in hand With the scale and the way you want to plot.
The line thickness is indifferent the type of linea that you use, that is to say, center, dashed, continuous, etc.
I hope this solves your inconvenience, or it helps you, I will be attentive if you want more information, do not hesitate contact with me.
Regards,
Johanna Esteban

Autodesk Expert Elite | Autodesk Certified Professional | AutoCAD Customer Council (Beta Tester for Windows & Mac)
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