When you modify features in a complex part or assembly, it may be convenient to postpone regeneration until you make all your changes, since regeneration can be time consuming. (For more information, see Editing a feature.) When you are ready to regenerate the part or assembly, you can select FeatureRegenerate from the main menu bar. You can also regenerate a feature by clicking mouse button 3 on the feature in the Model Tree and selecting Regenerate from the menu that appears.