Curves
Tools > Options > View > Display Modes > [Mode Name] > Objects > Curves
Curve settings
Curve color usage
Specifies a color for all curves.
Use object's color
Uses object's display color.
Use single color for all curves
Specifies a color for all curves.
Curve color
Sets the curve color.
Curve width usage
Use object's width
Uses object's linetype settings.
Scale
Scale factor of width.
Apply pattern
Displays linetype patterns.
Pixels
Uses screen pixels.
Width
Width in pixels.