Use the Feature Extraction page of the New Feature wizard to select the method you want to use to recognize features from a solid model.
Select a method of recognizing features:
To create all recognition features at the same height, select Force same Z height and enter an Elevation to specify the height at which you want to create the features.
Enter a Wall Angle to angle the walls of the feature.
Enter an Elevation to create the feature at a different height to the curves you select.
Enter the Elevation at which you want to create the features.
The image on the right of the dialog displays an example of the selected recognition method.