The Add New Part Choice dialog is used to search for and add supply chain information when adding a new part to the BOM. You can search using keywords then select an item from the search results and "copy" the data to the Part Choice Details region for ease in adding a new part.
The dialog is accessed by right-clicking in the main grid area then selecting Add Supply Chain Info for [Design Item Id] from the BOM Catalog tab in a *.BomDoc.
This region displays an image of the item selected in the upper region along with detailed information regarding Parameters, Documents, Pricing, and Stock. Use the scroll bars on the right-hand side to scroll through the region.