Each shape in a design maintains a list of parameters. This list does not vary in length or constitution. But each of the values can be edited independently.

  Which of the zoneTypes to set this shape to.
  At what vertical level should the extrusion start?
  How tall should the extruded shape be?
  To what ratio of the base size should the top curve flare to when the shape is extruded.
  How should this shape behave when it intersects with another shape? (There are 45 options.)

Try selecting and editing each of these values to get a feel for what they do. After each change, hit Apply Changes to see the result.