Hi Ali,
Have you considered using Work Allocations to organise your teamwork? EPPI-Reviewer is designed to help reviewers manage their work allocations and to keep track of proceedings, you can find a full description of these features in the manual, please see the "Allocating references for coding" chapter. Of course, you can just walk through the list of sources, but this is not the ideal way to proceed.
The "List" button on the sources tab gives you access to all items in a source, disregarding their flags (Included, Excluded, Deleted or Shadow), in this way there is always a way to access any item in a review. This system is intended to provide a way to locate items that have been flagged incorrectly. In particular, it is possible that users would misuse the advanced duplicate marking features and flag as duplicates too many items. Listing them by source will allow to regain access to duplicate items that should not be marked as such.
In the main documents tab you can see the items flag on the second column, all items will be marked as "I", "E", "D" or "S". You can also order each page of your item lists based on their flag: just click on the flag column header to sort your list in this way. Two clicks will order items by reverse alphabetic order, placing the "Shadow" items on top of the list.
I hope this helps,
Sergio