Use the Upper Surface Boundaries page of the New Feature wizard to select surface boundaries that define the shape of the top of the feature.
Use the buttons to select surface boundaries you want to machine:
— Hide the dialog and pick surface boundaries in the graphics window.
— Remove the selected item from the list.
— Move the selected item up in the list.
— Move the selected item down in the list.
— For the item selected in the list, change the boundary of the surface.
— Reverse the direction of the selected item.
Hide surfaces when finish — Select this option to hide surfaces used to create the feature when you finish the wizard.