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To assign serial numbers to each unit of the specified quantity of the product, in any of the listed types of documents, you need to click in the Serial number column on the Inventory tab of a document. This opens the following dialog box (the same for all types of documents). 
The Serial Numbers (assignment) dialog box
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In this dialog box you can view the serial numbers of the available units of the specified item and select which ones you want to pick for the document.
The Serial Numbers (usage) dialog box
The left pane shows the list of warehouses with serial numbers for quantities of the item which are available in these warehouses.
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You can view all the serial numbers assigned to a particular serialized item; for this, open the master record of the serialized item, click the link on the top of the form: More Actions > Serial Numbers. The list with all assigned serial numbers will be appear.
The list of serial numbers assigned to serialized item
Click any line to view transactions in which this unit was involved.
Transactions associated with the serial number
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