...
Enter the QTY you want to add of the item you will be searching for. And press the ENTER key on your keyboard and your cursor will automatically go to the Criteria drop down list box where you can type in any part of the part number then stop typing and a list of matching parts will appear. You must use at least 3 characters to activate the search. Choose the correct part you want to use and press the ENTER key on your keyboard to add the part to your BOM. The focus will return the QTY text box where you can type a new QTY (or not) and search for another part.
You can choose how you find the parts you are looking for by changing the "Choose From" drop down list box from "All Parts" to other items like Library, Catalog and Favorites.
You can choose the type of criteria you would like to use by changing the "Search By" drop down list box.
...