You may admit an item from both the Main screen and from the Presentation Mode. To Admit an item from the Main screen, select it from the List View, right click and choose Admit.
To Admit an item from the Presentation Mode, right click on the item while it is on screen and choose Admit.
To search for Admitted items, click on the Queries tree branch and select the Admitted Documents query. You may also create your own customized query from the Find/Query tab.