AutoCAD 2008 User's
Guide > Control the Drawing
Views > Change
Views > Shade a Model and
Use Edge Effects > Customize a Visual
Style >
Control the Display of Edges
Edges of different types can be displayed using different colors and linetypes. You can also add special effects such as jitter and overhang to edges.
In a shaded or a wireframe model, the visual style sets the visibility and appearance of isolines, facet edges, silhouette edges, obscured edges, and intersection edges. Facet edges (the edges between planar faces representing a surface) are displayed only when the angle between the facets is smaller than the crease angle value you specify.
Edge modifiers such as Overhang and Jitter produce the look of a model that is still in the conceptual phase. Jitter makes lines look as though they were sketched with a pencil. Overhang produces another kind of hand-drawn effect.
