Hey...basically the inputs is like the "history" of the object..you have to make sure that you have construction history set to "on" so that you have inputs (it's on the status line)...the inputs will stay there until you delete the history of the object (edit...delete by type...history)....it's a really nice feature cuz you can basically make your own default settings for every object..such as the number of sections or the radius of the object...
hopefully that helps a little...take it easy
TheAnswerRP03