Default Drive Boundary
Use the Shape field on the Default Drive Boundary tab of the Ring Design Setup form to specify a drive boundary profile to create a ring for created drive strings that do not have a wireframe tunnel.
The Shape field is optional, and when creating a new ring design file it will be empty, and the default profile shape will be a square with sides equal to 5. A warning message will be displayed when the profile shape is invalid - for example if the boundary is not closed.
When you select a Shape in the field using the list icon, a preview of the boundary is displayed in the tab.