When you open a file in the MCT, the items are displayed in the All Items navigation tree. The MCT uses the term item as a generic reference to an object or selection in the All Items tree. Items in the All Items tree include the site, devices, control systems or logic, graphics, objects, integrations, schedules, files, trend studies, field points, user-defined navigation trees, and other system data. You can nest items in the All Items tree as required by the system hierarchy. Right-click pop-up menus on items provide commanding and viewing options. An icon represents each item in the navigation tree.