From the manual, page 666:

9. NVIATWAS

Use:
  - Select the NVIATWAS tool in the 3D Primitives Tab.
  - Click in the 3D workspace to create the NVIATWAS, or by entering its coordinates in the
Object properties palette. If necessary, in the Tool properties palette choose create from
Center and not by Basis (the default).
  - Move the mouse to define the size of the breasts and validate the tool, or enter the
breast size in the Tool properties palette.
  - Once the NVIATWAS has been created, hit the +/- keys to change breast size, or manually
enter the breast size in the Tool properties palette.

Remark:
  - Unfortunately, due to a major bug that popped up at the last moment which would not allow the breast size to be set higher than 99ZZ, we had to remove this primitive from Hexagon 2, along with the "Create Awesome Model" and "Make Art" tools. We apologize for this inconvenience, and will release an update that includes these indespensible tools when hell freezes over.