Document Properties - Line Thickness
You can set the line weights in an active document that work best with
your printer or plotter. These settings are saved for all open SolidWorks
To set line thickness:
In the dialog box, under Document
Options, click Line Thickness.
In Line thickness
print settings, type a value for the line weights (Thin,
and five additional line thickness settings).
If you use specific Line
Thickness values in a SolidWorks drawing, the
lines print according to the settings in Document
Properties - Line Thickness.
to close the Print dialog box
and print the document.