Displaying an item allows a user to look at all the Attributes of the item but without being able to change any of them.
To display an item right-click the item (from any of the many places it can be listed in, e.g. the Item Explorer Window) and select Display from the popup-menu
If you know the name, the UID or the item's internal ID (starting with CI:, CIV: or CIS:) then you can directly open the item from the Cimera main window using File > Open Item... or by pressing the keyboard shortcut.
When displaying an item on the Item Details Window, there is an "Update" button to reopen the item in update mode.