To view outbound inventory details:
From the Inventory Dashboard, right-click and select View Outbound Inventory Details.

Requested is the quantity of the item requested by a transfer or sale, but not yet removed from the shelf.
Reserved is the quantity of items that have been removed from the shelf, but have not yet been sent.
To view the transaction (such as a sales request or transfer) that initiated the request for the item, right-click the item and select View Reservation Holder.