When items are on display they are exposed to a number of risks that are not present in the storage area. The environmental factors we discussed in the topic of Museum Environment are all relevant for display. Consider reviewing that topic now, if it has been some time since you last logged on.
All items need to be adequately supported when in storage or on display. Merely propping an object up to get the required angle for display can lead to severe damage.
As well as providing adequate support, it is important to protect items from damage that can result from people touching the exhibits. In order to prevent this type of damage: