Learn about the feature pattern improvements.
In the Part modeling environment, you can now use a face, multiple faces of the same planar feature, or a sketched boundary to pattern features only within that boundary. You select the method that is used for the pattern, such as only features within the boundary, all features with centroids inside the boundary, or by using a base point where all features with the base point inside the boundary are used.

For more information see About Part Feature Patterns and To Arrange Part Features in Patterns.