1. Black plotting method
plot [$raquo][$raquo] <plot style table(Pen Assignments) [$raquo][$raquo] MONOCHROME.CTB
2. setting linewidth with layer may be convience,but some time you need
different linewidth in one layer.For example you wish dimension line to
be thiner,unluckly dimension layer include dimension line and text. you
will found Text iwill be thin also.
3. In my opinion " IDENTIFY LINEWIDTH method" is actually work !
I have paste the concern post in this forum before, Please refer.