Very Valuable Variable 1: LWDISPLAY
Ridiculously thick lines even when they have no width?
Controls whether the lineweight is displayed. The setting is saved with each tab in the drawing.
0 Lineweight is not displayed
1 Lineweight is displayed
Very Valuable Variable 2: FILLMODE
Specifies whether hatches and fills, two-dimensional solids, and wide polylines are filled in.
0 Objects are not filled
1 Objects are filled