Especially in medium-sized companies with a wide range of diverse applications, the designer needs a practical and flexible design software, which is clear and easy to use. In MegaCAD the advantages of the parametric history-based modeling with the user-friendliness of the history-direct Modellieransatzes be combined. The designer is completely free in its operation. He is not forced to define parametric drawing objects to. He determines whether to feature-based 3D models directly, or want to model-based parametric 2D sketches.