Function
Normal
The surface borders are displayed normally, irrespective of type or attachment.
Attachment
The edges are displayed in different colours, depending on their surface attachment.
- white: edges with surface attachment on both sides
- green: edges which only have a surface attachment on one side
- red: edges without surface attachment.
Geometric connection
Edges which attach to 2 surfaces are marked in different colours, depending on their transitional behaviour, while all other edges are marked in white.
- white: edge not on 2 facets
- green: convex
- red: concave
- light blue: tangential.
