Use the Select Round Stock Center page to specify the location of the central axis of the stock.
Use one of the buttons to locate the central axis:
Pick location — Select a location in the graphics window that represents the round stock center point.
Center of revolved surface — Select a revolved surface to use the axis about which it is revolved is as the center of the stock.
Center of imported data's bounding box — Use the geometric center of the imported data as the center of the stock. Use this option to quickly position the stock when importing simple or symmetrical solids.