This page deals with the following settings:
Curve
By default, the color is set to white, the type to 1 and the thickness to
2.
Surface
This option lets you define the color of surfaces.
By default, the color is set to light purple.
Base Mesh
This option lets you define the graphic properties for base meshes.
By default, the mesh color is set to white; the line type to 2, the line
type with weight to 1, the line thickness to 1, the line type with weight
to 3; the point symbol to 
and the point symbol with weight to
.