A nitride semiconductor light-emitting device according to the present invention comprises a first nitride semiconductor layer; an active layer formed on the first nitride semiconductor layer; a second nitride semiconductor layer formed on the active layer; and a third nitride semiconductor layer having AlIn, which is formed on the second nitride semiconductor layer. As a result of the use of the pushing mechanism, the engagement completion time for suction cups, if used, are reduced significantly. A packaging article is also disclosed that is made from the package coating on a substrate. The protruding portion extends from the second body. Systems and methods for adjusting the viewing characteristics of the display system are also disclosed. The user may change any feature in any box\u2014such as the width of one box\u2014and, in response, the entire design may be re-rendered automatically to reflect not only the specific change made by the user to a particular box, but also changes to other boxes necessitated by the user’s change.