Thanks guy's.
Was able to change the color - much nicer to my eye as a mid grey rather than the solid black.
Can't find any way to change the line width. Maybe a Mac thing. Maybe a me thing:)

I realize that they are very important to any construction - I've worked for years with the now defunct Electric Image's Solid Modeler.
I guess you just get used to the way things are displayed in a program you use a lot.