First, the ridge line has to be defined so that an automatic suggestion for the base boundary can be made and later for the correct location of the teeth master work.
The default view shows the re-scaled mesh of the upper or lower jaw. The wizard on the left side shows pictures, guiding the technician. For the lower jaw, the technician has to set 9 points for the alveolar ridge and 4 anatomic points (the green ones).
In addition to the Alveolar Ridge, the point of the buccal and labial frenulums needs to be defined here to be used in further steps.
The canines are defined by the palate fold which can be shown as (predefined) area here to help to mark them.
