# Use of Selection Sets
Many sculpt commands operate on model sets.
It is possible to adorn just items in a model set with labels, diagrams and contouring.
Annotation of diagrams and contouring can be applied to a set. In this case it is not a model set that is used but a set associated with the particular diagram or contour display. The set is automatically configured to be of the type (node or element etc.) appropriate for the data being annotated.