Allowed attributes:
Hidden, Name, PointColor, PointLabels, PointStyle, Title, VertexColor, VertexLabels, VertexStyle
Allowed attributes:
EdgeColor, EdgeStyle, FacetColor, FacetLabels, FacetStyle, Hidden, Name, PointColor, PointLabels, PointStyle, Title, VertexColor, VertexLabels, VertexStyle

The methods described below can be used to add more details to drawings created by the following visualization methods:

Polytope::SCHLEGEL | SchlegelDiagram::VISUAL

DIRECTED_GRAPH
Illustrate the behavior of a linear objective function on the polytope. Superpose the drawing with the directed graph induced by the objective function.
VERTEX_COLORS
Illustrate the behavior of a linear objective function on the polytope. Color the vertices according to the values of the objective function.
TRIANGULATION_BOUNDARY
Draw the edges of the TRIANGULATION_BOUNDARY
SOLID (%Visual::Polyhedron::decorations)
Draw the facets of the Schlegel diagram as polytopes.
CONSTRUCTION (%Visual::Polyhedron::decorations)
Visualize the construction of a 3D Schlegel diagram, that is, the Viewpoint, the 3-polytope and the projection onto one facet
STEINER (%Visual::PointSet::decorations)
Add the STEINER_POINTS to the 4-d visualization.

Each auxiliary method always returns the visual object it was called with ($this), which makes it easy to build longer method chains of the kind: VISUAL->DIRECTED_GRAPH->VERTEX_COLORS .