The DesignModeler application is a parametric feature-based modeler. Its modeling paradigm is to sketch 2D profiles and use them to generate features. In CAD systems, features are collections of geometric shapes with which you add or cut material from a model. In the DesignModeler application, you can also use features to slice a model into separate bodies for improved mesh generation or to imprint faces for patch loading. More generally, in the DesignModeler application you can apply features to the task of enhancing your models for the purpose of engineering simulation.

Because the DesignModeler application is a feature-based modeler, the features shown in the feature Tree Outline list all of the operations used to create the model. This feature list represents the model's history. Features may be modified and the model rebuilt to reflect your changes. Features may also be suppressed, deleted, or even inserted into the middle of the feature list.

A sketch is always required at the start of creating a new model. However not all features, such as Blend and Chamfer, require you to create sketches. Some features, such as Extrude or Sweep, require you to create sketches prior to their definition.