Thanks for the reply Arthur. (though I am looking for .0039", not .039" .... )
What i am really trying to do is to increase the depth of my line thickness options. So if 0.0098 is my "standard" part line thickness, then I could have 3 layers of thinner lines below that (.0079, .0039, .002) , instead of the single one SW defaults to.
This is frustrating. Not the end of the world and for most people I suppose this isn't a big deal but I spend a LOT of time using the Drawing editor. We've had WYSIWYG for what - 30 years now? And the user does not have a say in displayed line thickness?