Rebuild
Rebuilds the model with changes.
To rebuild the model:
Click Rebuild 
(Standard toolbar) or , or press Ctrl + B.
Rebuilds only the features that changed since the last rebuild.
To rebuild all features, press Ctrl + Q. Can take significantly more time, depending on the complexity of your model.
When you reorder an imported feature or any other feature with no parent or child, the part does not rebuild - only the FeatureManager design tree rebuilds.